Question

if 10, 20 X and 40 are in a proportion, the value of x will be​

Answer 1

10/20 equal to x/40

10×40equal to 20×x

400/20 equal to x

x equal to 20 Ans.

Answer 2

The value of x is equal to 20.

Step-by-step explanation:

We have,

10, 20, x and 40 are in a proportion.

10 : 20 : : x : 40

To find, the value of x = ?

We know that,

a : b : : c : d

Product of means = Product of extremes

a × d = b × c

∴ 20 × x = 10 × 40

⇒ 20x = 400

⇒ x = $\dfrac{400}{20}$

⇒ x = 20

∴ The value of x = 20

Thus, the value of x is equal to 20.