| Answer | Crossword Clue |
|---|---|
| OAHU | Fourth most populous U.S. island |
| HOUSTON | Fourth-most populous U.S. city |
| SAN | Start of the names of three of the 10 most populous U.S. cities |
| INDONESIA | World's fourth-most populous country |
| PERTH | Australia's fourth-most populous city |
| FLA | Fourth-most populous state, just after N.Y. |
