Question

Find the missing number in the blank in the following proportion:__ : 5 :: 12 : 60​

Answer 1

The required missing number = 1

Given :

__ : 5 :: 12 : 60

To find :

The missing number in the blank of proportion

Solution :

Step 1 of 2 :

Form the equation

Let the required missing number = x

By the given condition

x : 5 :: 12 : 60

$\displaystyle \sf{ \implies \frac{x}{5} = \frac{12}{60} }$

Step 2 of 2 :

Find the missing number

$\displaystyle \sf{ \frac{x}{5} = \frac{12}{60} }$

$\displaystyle \sf{ \implies x = 5 \times \frac{12}{60} }$

$\displaystyle \sf{ \implies x = \frac{60}{60} }$

$\displaystyle \sf{ \implies x = 1 }$

The required missing number = 1