Question

are 12,15,4 and 5 in proportion or not?
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Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

Yes they are in proportion

Step-by-step explanation:

12:15::4:5

15 and 4 are means

12 and 5 are extremes

If the product of extremes=product of means then th two ratios are in proportion

15×4=60

12×5=60

60=60

Means=Extremes

Therefore,12:15::4:5 are in proportion