Question 394711
{{{log(5.4, (4x))}}}
A ratio of common logs? A ratio of logs should bring to mind the base conversion formula: {{{log(a, (p)) = log(b, (p))/log(b, (a))}}}. So all we have to do is use this formula to convert the base 5.4 log into a ratio of common (i.e. base 10) logs:
{{{log(5.4, (4x)) = log((4x))/log((5.4))}}}