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Finding the Fourth Proportional to 20,622.60, 30,933.90 and 10,781.10

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Solution

The fourth proportional to 20,622.60, 30,933.90 and 10,781.10 is: 16,171.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,622.60 : 30,933.90 = 10,781.10 : x
  2. Step 2: Convert to fraction form
    20,622.60/30,933.90 = 10,781.10/x
  3. Step 3: Cross multiply
    20,622.60x = 30,933.90 × 10,781.10
  4. Step 4: Simplify right side
    20,622.60x = 333,501,469.29
  5. Step 5: Solve for x
    x = 333,501,469.29/20,622.60
  6. Step 6: Final answer
    x = 16,171.65

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Similar ratio
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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.