Fort Wayne, Indiana is 27% larger than Grand Prairie, Texas.
Area: 287 km2 calculated
Fort Wayne is a city in the U.S. state of Indiana and the county seat of Allen County. The population was 256,496 as of the 2013 Census estimate making it the 76th largest city in the United States and the second largest in Indiana after Indianapolis. Wikipedia
Area: 226 km2 calculated
Grand Prairie is a city in Dallas, Ellis, and Tarrant counties in the U.S. state of Texas and is a part of the Mid-Cities region in the Dallas–Fort Worth metroplex. Wikipedia