Question

Find the fourth term of the proportion, whose first three terms are: 10, 15, 20.

Answer 1

Let the fourth term of the Proportion be x

10 : 15 :: 20 : x

$\displaystyle \frac{10}{15} = \frac{20}{ \sf \: x}$

10x = 20 × 15

10x = 300

x = 30

Answer 2

Answer:

let the fourth term be *

and multiply 10 × x

and

15 × 20

by

10 × x

10 se 20 khate

to 2 bhacha

15 × 2 = 30

x =. 30