Question

First, second and terms of a proportion are respectively, 4 6 and 8. Find its fourth term

Answer 1

Let the fourth term = x

We know 4:6 = 8:x

4:6 = 2:3 so,

8:x = 2:3 if 2*4 = 8 3*4= x = 12

So the fourth term is 12