Question

If 10:80 :: x : 120, then find the value of x.

Answer 1

10 ×120 = 80× x

1200 = 80x

x= 1200/ 80

x =15

It's the correct answer

Hope it helps

Answer 2

Value of x is 15.

Given:

• $10:80 :: x : 120$

To find:

• Find the value of x.

Solution:

Concept to be used:

$\bf a:b :: c : d$ are in proportion, then $\bf a\times d = b\times c$

Step 1:

Write the proportions in term of fraction.

$10\times 120 = 80\times x$

Step 2:

Cross multiply and solve for x.

$x = \frac{10 \times 120}{80}$

or

$x = \frac{120}{8}$

or

$\bf x = 15$

Thus,

Value of x is 15.

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