Fort Worth, Texas is 8.3 times larger than San Francisco.
Area: 1,011 km2 calculated
Population: 777,992 (2012)
Fort Worth is the 17th-largest city in the United States of America and the fifth-largest city in the state of Texas. Wikipedia
Area: 122 km2 calculated
Population: 825,863 (2012)
San Francisco, officially the City and County of San Francisco, is the cultural center and a leading financial hub of the San Francisco Bay Area and Northern California. Wikipedia