\frac{I_{A}}{I_{B}} = (\frac{d_{B}}{d_{A}} )^{2}

d_{B} = d_{A} \sqrt{\frac{I_{A}}{I_{B}}}

\frac{I_{A}}{I_{B}} = 10^{0.4(m_{B}−m_{A})}

d_{B} = d_{A} 10^{0.2(m_{B}−m_{A})}