Oklahoma City is 15 times larger than Provo, Utah.
Area: 1,682 km2 calculated
Oklahoma City is the capital and largest city of the U.S. state of Oklahoma. The county seat of Oklahoma County, the city ranks 27th among United States cities in population. The population grew following the 2010 Census, with the population estimated to have increased to 610,613 as of July 2013. Wikipedia
Area: 114 km2 calculated
Provo is the third-largest city in the U.S. state of Utah, located about 43 miles south of Salt Lake City along the Wasatch Front. Provo is the largest city and county seat of Utah County. It lies between the cities of Orem to the north and Springville to the south. Wikipedia