Answer:
The journal entry would be passed as the accounts are closed, which is shown below:
Explanation:
As the books are closed, then the correction would be made against the capital accounts of the partners. And the following Journal entry would be made as:
Land A/c................................Dr  $30,000
    A's Capital A/c..................Cr   $15,000
    B's Capital A/c..................Cr   $9,000
    C's Capital A/c..................Cr   $6,000
Working Note:
The amount of land is to be proportionate as the ratio of the partners which is computed as:
A's Capital A/c = Land amount × Ratio of A / Sum of ratios
= $30,000 × 5 / 10
= $15,000
B's Capital A/c = Land amount × Ratio of A / Sum of ratios
= $30,000 × 3 / 10
= $9,000
C's Capital A/c = Land amount × Ratio of A / Sum of ratios
= $30,000 × 2 / 10
= $6,000