\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
For this relation:
\(\textcolor{colordef}{x}\) \(1\) \(2\) \(3\) \(4\) \(5\) \(6\)
\(\textcolor{colorprop}{y}\) \(1\) \(4\) \(9\) \(16\) \(25\) \(36\)
Find the value of \(\textcolor{colordef}{x}\) when \(\textcolor{colorprop}{y}=16\).
\(\textcolor{colordef}{x}=\)