The West Indies made 178-8 from their 20 overs after winning the toss and choosing to bat first.
Shimron Hetmyer led the way with a 39-ball 61, his fifth T20I fifty, including three fours and four sixes.
Shai Hope provided good support with 45 off 29 balls against Arshdeep Singh’s 3-38 off four overs. Kuldeep Yadav continued his good form in the series with 2-26 from four overs in support.
India’s opening pair of Yashasvi Jaiswal and Shubman Gill then made quick work of the West Indies total, batting beautifully to put on 165 for the first wicket before Gill fell in the 16th over for a 47-ball 77. Gill’s knock included three fours and five sixes.
The partnership put the pair level with Rohit Sharma and KL Rahul for the highest opening partnership for India in T20 Internationals. Rohit and Rahul did that against Sri Lanka in Indore six years ago.
In the end, India needed just 17 overs to reach 179-1. Jaiswal ended 84* off 51 balls including 11 fours and three sixes.
The fifth and series-deciding T20I will take place on Sunday.
Former West Indies all-rounder Ashley Nurse hit a rapid 10-ball 24 to help the California Knights post 76-1 off their five overs batting first.
Irfan Pathan hit a top score of 31 off just 13 balls against 1-10 from Liam Plunkett.
Ben Laughlin then took 2-7 in his over to help restrict the Triton’s to 52-3 off their five overs.
Another former West Indies all-rounder, Chris Barnwell, hit 29 off 15 balls.
The New York Warriors posted 124/3 in their 10 overs before restricting Morrisville Unity to 118/5.
The Morrisville Unity couldn't get their batting innings going right from the beginning of their innings as Parthiv Patel was dismissed by Dhammika Prasad for 3 runs in the third over. Chris Gayle and Corey Anderson also departed in quick succession, leaving Morrisville Unity in deep trouble at 33/3 in 5 overs.
Thereafter, Obus Pienaar played a brilliant innings of 35 runs from 12 balls and Shehan Jayasuriya smashed 28* runs off 10 balls, but they couldn't take their team over the line.
Earlier in the day, Morrisville Unity won the toss and put the New York Warriors into bat. Tillakaratne Dilshan got the Warriors off to a great start as he struck Calvin Savage for consecutive boundaries in the second over. However, he was trapped LBW by Obus Pienaar in the very next over. But Richard Levi ensured that the momentum stayed on the Warriors' side as he struck two fours and two sixes off Rahul Sharma's bowling in the fourth over.
Thereafter, Levi smacked Sreesanth for three consecutive sixes and took the Warriors' score to 73/1 in five overs. He sent the ball over the boundary two more times before falling to Calvin Savage for a scintillating innings of 66 runs from 25 balls in the ninth over. Corey Anderson conceded just eight runs in the last over as the New York Warriors posted 124/3 in their 10 overs.
Brief Scores: New York Warriors 124/3 (Richard Levi 66, Kamran Akmal 24, Obus Pienaar 1/18) beat Morrisville Unity 118/5 (Obus Pienaar 35, Shehan Jayasuriya 28*, Umaid Asif 3/22) by 6 runs.
After winning the toss and electing to field first, the hosts felt the wrath of the Indians from the outset with openers Rohit Sharma and Suryakumar Yadav speeding to 53 without loss after just 4.4 overs before Sharma was dismissed for a 16-ball 33 including two fours and three sixes.
Yadav’s dismissal for 24 in the sixth over then paired Deepak Hooda and Rishabh Pant who added a further 47 before Hooda’s wicket fell for 21 in the 12th over to leave the score on 108-3.
Pant went on to top-score with 44 before his dismissal in the 15th over. Sanju Samson (30 not out), Axar Patel (20 not out) and Dinesh Karthik (6) then combined to put the finishing touches on a fine effort with the bat for India, ending 191-5 from their 20 overs.
Alzarri Joseph was the pick of the bowlers for the Windies with 2-29 from his four overs.
The hosts then struggled throughout their reply thanks to some excellent bowling by India and some questionable decision-making by the batsmen.
Brandon King (13) and Kyle Mayers (14) both got starts but fell cheaply while captain Nicholas Pooran sprinted to 24 off just eight balls before he was run out after a mix-up with Mayers.
Rovman Powell with a quick 24, Shimron Hetmyer (19) and Jason Holder (13) were the only other batsmen to reach double-figures as the Windies struggled to a paltry 132 all-out after 19.1 overs.
Arshdeep Singh led the way for the Indians with 3-12 from 3.1 overs while he got good support from Avesh Khan (2-17) and Ravi Bishnoi (2-27).
