How do you solve #x=log_4 19.5#? Precalculus Properties of Logarithmic Functions Natural Logs 1 Answer Shell Nov 25, 2016 #x=2.1427# Explanation: Use the change of base formula: #log_b a = loga/logb# #x=log_4 19.5 = log19.5/log4# Then use a calculator. #x=2.1427# Answer link Related questions What is the natural log of e? What is the natural log of 2? How do I do natural logs on a TI-83? How do I find the natural log of a fraction? What is the natural log of 1? What is the natural log of infinity? Can I find the natural log of a negative number? How do I find a natural log without a calculator? How do I find the natural log of a given number by using a calculator? How do I do natural logs on a TI-84? See all questions in Natural Logs Impact of this question 1546 views around the world You can reuse this answer Creative Commons License