Home / 20,939.30-31,414.13-10,414.32

Finding the Fourth Proportional to 20,939.30, 31,414.13 and 10,414.32

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Solution

The fourth proportional to 20,939.30, 31,414.13 and 10,414.32 is: 15,624.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.30 : 31,414.13 = 10,414.32 : x
  2. Step 2: Convert to fraction form
    20,939.30/31,414.13 = 10,414.32/x
  3. Step 3: Cross multiply
    20,939.30x = 31,414.13 × 10,414.32
  4. Step 4: Simplify right side
    20,939.30x = 327,156,750.27
  5. Step 5: Solve for x
    x = 327,156,750.27/20,939.30
  6. Step 6: Final answer
    x = 15,624.06

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1.5x scale

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.