Question

Using the numbers 30, 16, 12 and40, form a proportion.

Answer 1

Hey there,

If a:b::c:d

then,

a*d=b*c

Since 30*16=40*12, so-

12:16::30:40
or
16:12::40:30
or
30:12::40:16
or
12:30::16:40

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Answer 2

Answer:

the answer will be

30:12::40:16

hope it will helpful for you

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