4. (8 points) In the movie "The Monkey King's Return", there is a scene where Monkey King battles mountain demons. Some of the demons are knocked down, and the number of those knocked down is one third more than those standing; After a while, 2 more demons are knocked down, but then 10 demons stand up again. At this point, the number of standing demons is one quarter more than those knocked down. How many demons are standing now?


35
【Solution】According to the analysis, at the beginning, the number of goblins knocked down is $\frac{1}{3}$ more than those standing, so the knocked down goblins account for $\frac{4}{7}$ of the total goblins. After a while, the number of standing goblins is $\frac{1}{4}$ more than those knocked down,
$\therefore$ the knocked down goblins account for $\frac{4}{9}$ of the total goblins; during this period, the number of knocked down goblins decreased by 8,
$\therefore$ the total number of goblins is: $8 \div\left(\frac{4}{7}-\frac{4}{9}\right)=63$;
At this moment, the number of standing goblins is: $63 \times \frac{5}{9}=35$.
Therefore, the answer is: 35.