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Finding the Fourth Proportional to 20,007.20, 30,010.80 and 8,902.10

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Solution

The fourth proportional to 20,007.20, 30,010.80 and 8,902.10 is: 13,353.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,007.20 : 30,010.80 = 8,902.10 : x
  2. Step 2: Convert to fraction form
    20,007.20/30,010.80 = 8,902.10/x
  3. Step 3: Cross multiply
    20,007.20x = 30,010.80 × 8,902.10
  4. Step 4: Simplify right side
    20,007.20x = 267,159,142.68
  5. Step 5: Solve for x
    x = 267,159,142.68/20,007.20
  6. Step 6: Final answer
    x = 13,353.15

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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.