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Finding the Fourth Proportional to 8,812.20, 13,218.30 and 8,301.90

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Solution

The fourth proportional to 8,812.20, 13,218.30 and 8,301.90 is: 12,452.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,812.20 : 13,218.30 = 8,301.90 : x
  2. Step 2: Convert to fraction form
    8,812.20/13,218.30 = 8,301.90/x
  3. Step 3: Cross multiply
    8,812.20x = 13,218.30 × 8,301.90
  4. Step 4: Simplify right side
    8,812.20x = 109,737,004.77
  5. Step 5: Solve for x
    x = 109,737,004.77/8,812.20
  6. Step 6: Final answer
    x = 12,452.85

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Double scale
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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.