Home / 20,385.10-30,532.49-15,670.40

Finding the Fourth Proportional to 20,385.10, 30,532.49 and 15,670.40

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Solution

The fourth proportional to 20,385.10, 30,532.49 and 15,670.40 is: 23,470.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.10 : 30,532.49 = 15,670.40 : x
  2. Step 2: Convert to fraction form
    20,385.10/30,532.49 = 15,670.40/x
  3. Step 3: Cross multiply
    20,385.10x = 30,532.49 × 15,670.40
  4. Step 4: Simplify right side
    20,385.10x = 478,456,331.30
  5. Step 5: Solve for x
    x = 478,456,331.30/20,385.10
  6. Step 6: Final answer
    x = 23,470.88

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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.