A,B, C and D are four positive numbers such that A is \(\frac{3}{4}\) times of B, B is \(\frac{4}{5}\) times of C, and C is \(\frac{3}{8}\) times of D. If the average of 4 times of A and 7 times of D is 316, then the average of all the four numbers A, B, C and D is:
1
36
2
38
3
28
4
34