I found about a half dozen sites that show you how to do that but I don't know what kind of phone it is! If you put your question in a search engine with the type of cell phone, there will be sites to tell you how to find it with different Apps.
I've misplaced my cell phone. How can I locate it via GPS from my iPad?
If it's an IPhone and you updated the IPad to the latest IOS version, there is a feature called "Find my IPhone" built in. You can also contact your provider and they can find most any smart phone's approximate location. Also If you have a friend that also has an IPhone with the most recent IOS they can find it for you as well.