Find the third proportional to 25 and 4 Share with your friends Share 2 Vijay Kumar Gupta answered this Let the third proportional to 25 and 4 be 'x'This means that, 25:4=4:x 254=4xCross multiply and simplify to get, 25x=4×4 25x=16 x=1625Thus the third proportional to 25 and 4 is 1625 3 View Full Answer