In each of the following questions, there is a certain relationship between two given numbers on one side of (: :) and one number is given on another side of (: :) where another number is to be found from the given alternatives, having the same realtionship with this numbers of the given pair bear. Choose the best alternative.
3 : 27 : : 4 : ?
1) 16
2) 64
3) 32
4) 28

Explanation

2, 10