Question

By proportionality law, check 3:5 and 12:20 are in proportion

Answer 1

Step-by-step explanation:

3:5::12:20

To check the above in proportion,

Product of extreme=Product of mean

Product of extreme=3*20=60

Product of mean=5*12=60

Since LHS=RHS

Therefore, 3:5::12:20 are in proportion..

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Answer 2

Answer:

3:5 = 3/5

12:20 = 12/20

12/20 can be further simplified

i.e 12 and 20 can be cancelled by 4

after cancelling we get as 3/5 which is same as 3:5

therefore we can say 3:5 is proportional to 12:20