Question

The first three terms of a proportion are 12, 21 and 20 . Find the fourth term.​

Answer 1

=12/21 will reduce
= 4/7
=now,we will take 2 table then,
= 2*4=8
= 2*7=14

Therefore the fourth term is 14

cross verification

=12/21
= reduce form 4/7

8/17
= reduce form 4/7

4/7=4/7

ans is 12:21::8:14

Answer 2

Answer:

let the fourth term is x

12 : 21 = 20 : x

=> 12/21=20/x

=> 12x=20*21

=> x=20*21/12

=> x=35

the fourth term is 35