where would this 3bet you speak of occur? PF? and if you were BU 3bing over CO open or....?
4x 3b seems like overkill to me unless YOU want to get it in.
(50bb effective) like hes CO opens 3x, you 3b BU 4x. 1.5 bb + 3bb + 12bb = 16.5bb pot.
you have 38bb left. seems like to 4b/continue to a 4b would have to be AI (or commited). Theres some math to this.... (enter math dude).