Question

First, second and third terms of a proportion are respectively 20,18 and 40. Find its
fourth term ​

Answer 1

Answer:

20 : 18 :: 40 : x

20 * x = 18 * 40

20x = 720

x = 720/20

x = 36

hope it will help you

Answer 2

Answer:

The fourth term is 36.

Step by step explanation:

Given : First, Second and third terms of a proportion are respectively 20, 18 and 40.

To find : The fourth term ?

Solution:

If the four terms are in proportion a:b:: c:da:b::c:d then a/b = c/d

First, Second and third terms of a proportion are respectively 20, 18 and 40.

i.e.a=20, b=18 and c=40

20/18 = 40/d

d = 40×18/20

d= 36

Therefore the fourth term is 36.