Question

Check if the numbers 20, 25, 12, 15 are in proportion or not. (please show working!)

Answer 1

Answer:

YES THE NUMBERS 20,25,12,15 ARE IN PROPORTION..

Step-by-step explanation:

PROPORTION FORMULA= EXTERMS::INTERMS

• 20:25::12:15
• 20x15::25x12
• 300::300
• 1::1

• SO THEY ARE IN PROPORTION

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Answer 2

Yes 20, 25, 12, 15 are in proportion

Given :

Four numbers 20, 25, 12, 15

To find :

To check whether they are in proportion

Solution :

Step 1 of 3 :

Write down the given numbers

The given numbers are 20, 25, 12, 15

Step 2 of 3 :

Write down the condition for proportion

Four given numbers a , b , c , d are said to be in proportion if product of extreme terms = product of middle terms

That is , a × d = b × c

Step 3 of 3 :

Check whether 20, 25, 12, 15 are in proportion

Extreme terms are 20 & 15

Middle terms are 25 & 12

Product of extreme terms = 20 × 15 = 300

Product of middle terms = 25 × 12 = 300

Thus we observe that

Product of extreme terms = Product of middle terms

Hence we can conclude that 20, 25, 12, 15 are in proportion

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