Question

find the missing number in the following proportion 15:19=___:57​

Answer 1

Answer:

15:19::45:57

Step-by-step explanation:

Since, 19x3=57

So, 15x3=45

Answer= 45

Answer 2

15 : 19 = 45 : 57

Given :

15 : 19 = ____ : 57

To find :

The missing number in the proportion

Solution :

Step 1 of 2 :

Form the equation to find the missing number

Let x be the missing number in the proportion

So by the given condition

$\displaystyle \sf 15 : 19 = x : 57$

Step 2 of 2 :

Find the missing number in the proportion

$\displaystyle \sf 15 : 19 = x : 57$

$\displaystyle \sf{ \implies } \frac{15}{19} = \frac{x}{57}$

$\displaystyle \sf{ \implies }x = 57 \times \frac{15}{19}$

$\displaystyle \sf{ \implies }x = 45$

∴ The missing number in the proportion = 45

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