Three of four numbers have a sum of 22. if the average of the four numbers is 8, what is the fourth number? don't just answer, tell me how to answer. i think i just need setting up the correct equation

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents