\[\boxed{\mathbf{4.}\mathbf{85}}\]
\[\textbf{а)}\ | - 39,8| > |9,98|\]
\[\textbf{б)}\ | - 49,8| > |31,9|\]
\(в)\ |93,1| > | - 41,5|\)
\[\textbf{г)}\ | - 21,4| > | - 21,3|\]
\[\textbf{д)}\left| - 4\frac{3}{7} \right| < \left| 5\frac{3}{11} \right|\]
\[\textbf{е)}\left| 3\frac{4}{7} \right| > \left| - 6\frac{1}{7} \right|\]
\[\textbf{ж)}\ \left| - \frac{3}{7} \right| > \left| \frac{1}{5} \right|\]
\[\frac{3}{7} = \frac{15}{35};\ \ \frac{1}{5} = \frac{7}{35}.\]
\[\textbf{з)}\ \left| \frac{7}{9} \right| > \left| - \frac{3}{4} \right|\]
\[\frac{7}{9} = \frac{28}{36};\ \ \frac{3}{4} = \frac{27}{36}.\]