How to Find the X of a Geometric Sequence


Hi, my name is Stefan. Today, I'm going to be speaking on how to find the X of the unknown in a geometric sequence. Now say for example we have the sequence 2X and 4X and 24. Well we know that in the geometric sequence we're always multiplying by the same thing, by the same constant to get the next number. So we divide 4X by 2X, this cancels and this gives us 2. So we multiply by 2 to get the next number here. So 4X x 2 = 24. So that's X = 3 and when you plug it in, we get our original numbers, 2 x X which is 3 so that gives us 6 and 4 x X which is 3 which gives us 12 and 24 and then we have our geometric sequence.

Stefan Robert is an expert in computers, with two degrees in both Computer Science and Applied Mathematics from the New Jersey Institute of Technology.