# What is the common ratio in this geometric sequence 3, 18, 108, 648, 3888, ...?

##### 1 Answer

Nov 9, 2015

The ratio is

#### Explanation:

A term in a geometric series are obtained by multiplying the previous one by a fixed value, called *ratio*, which we will call

So, the second term

The same goes for the third, since

You can check that also the reimaining terms obey this rule, so the ratio is