Home / 20,951.28-31,423.68-13,607.82

Finding the Fourth Proportional to 20,951.28, 31,423.68 and 13,607.82

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Solution

The fourth proportional to 20,951.28, 31,423.68 and 13,607.82 is: 20,409.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.28 : 31,423.68 = 13,607.82 : x
  2. Step 2: Convert to fraction form
    20,951.28/31,423.68 = 13,607.82/x
  3. Step 3: Cross multiply
    20,951.28x = 31,423.68 × 13,607.82
  4. Step 4: Simplify right side
    20,951.28x = 427,607,781.18
  5. Step 5: Solve for x
    x = 427,607,781.18/20,951.28
  6. Step 6: Final answer
    x = 20,409.63

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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.