First, second and third terms of a proportion are 9,27 and 3 respectively. Find the fourth term.

Answer

To find the fourth term in the proportion where the first three terms are 9, 27, and 3, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Terms**:
The first term (a) = 9, the second term (b) = 27, and the third term (c) = 3. We need to find the fourth term (d).

2. **Set Up the Proportion**:
According to the properties of proportions, we can set up the equation as:
\[ \frac{a}{b} = \frac{c}{d} \]
Substituting the known values:
\[ \frac{9}{27} = \frac{3}{d} \]

3. **Cross-Multiply**:
To eliminate the fractions, we cross-multiply:
\[ 9 \cdot d = 27 \cdot 3 \]

4. **Calculate the Right Side**:
Now calculate the right side:
\[ 27 \cdot 3 = 81 \]
So, we have:
\[ 9d = 81 \]

5. **Solve for d**:
To find d, divide both sides by 9:
\[ d = \frac{81}{9} = 9 \]

6. **Conclusion**:
The fourth term (d) is 9.

### Final Answer:
The fourth term is **9**.