Question

which are the following are in proportion.
1.4:9::81:36
2.15:11::30:22
3.3:2::30:20
4.7:6::28:21
plzz give the solution step by step .​

Answer 1

Answer:

in proportion means the second ratio divided by first ratio should give you a whole number...infact an integer

here on doing that ===> we get (2) and (3) are in proportion