Solve for the unknown number of years in each of the following. (Do not round intermediate calculations and round your answers to 2 decimal places, e.g., 32.16.)

Present Value ($) 640 890 19,200 22,300

Years ___ ___ ___ ___

Interest Rate (%) 10 11 16 13

Future Value ($) 1,886 2,349 292,799 337,837