Home / 25.38-38.08-20.88

Finding the Fourth Proportional to 25.38, 38.08 and 20.88

Calculator

Solution

The fourth proportional to 25.38, 38.08 and 20.88 is: 31.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.38 : 38.08 = 20.88 : x
  2. Step 2: Convert to fraction form
    25.38/38.08 = 20.88/x
  3. Step 3: Cross multiply
    25.38x = 38.08 × 20.88
  4. Step 4: Simplify right side
    25.38x = 795.11
  5. Step 5: Solve for x
    x = 795.11/25.38
  6. Step 6: Final answer
    x = 31.33

Related Problems

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.