What's missing from this sequence of numbers? 4, 8, 12, 20, 52?

To solve this problem you must apply the proccedure shown below:

1. You have the following sequence of numbers given in the problem above:

2. As you can see, the third term is the sum of the first term and the second term, then, the missing one , which is the fifth term, must be the sum of the third term and the fourth term:

3. Therefore, when you sum the fourth and the fith term, you obtain the last one:

The answer is:

this is answer of 144 cubic meters