We'll call the unknown number "n."
Four more than two thirds of a number is 22.
Four more than (two thirds of a number) is 22.
4 + (two thirds of a number) = 22
4 + (

* n) = 22
Now, we solve.
4 + (

* n) = 22
4 + (

* n) - 4 = 22 - 4
(

* n) = 18
(

* n) / (

) = 18 / (

)
n = 18 * (

)
n = 27
Hope this helps! :)