Answer:
108
Step-by-step explanation:
To find a missing number in a sequence, find the relation between all the numbers. If you look at 4 and then twelve, there are two ways you can get from 4 to 12.
4 + 8
or
4 • 3.
Now see if when you add eight to 12 you get to 36.
12 + 8 = 20
This doesn't work, so try multiplying by 3.
12 • 3 = 36
Yes! So this must be the rule for all the numbers.
36 • 3 = 108 so that is the missing number.
To check to see if you are right, multiply 108 by three to get 324, the next number in the sequence.