Yes most likely, here is formula that will get you close. Drive gear teeth X axle ratio X tire revolution per mile divide by 1001 = driven gear. An example most trans drive teeth are 6,7,8.
Here is my 73
7x3.70= 25.9
25.9 x721.9=18697
18697 divided by 1001=18.69 round it up and your at 19...