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Finding the Fourth Proportional to 10,279.20, 15,397.20 and 8,551.20

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Solution

The fourth proportional to 10,279.20, 15,397.20 and 8,551.20 is: 12,808.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,279.20 : 15,397.20 = 8,551.20 : x
  2. Step 2: Convert to fraction form
    10,279.20/15,397.20 = 8,551.20/x
  3. Step 3: Cross multiply
    10,279.20x = 15,397.20 × 8,551.20
  4. Step 4: Simplify right side
    10,279.20x = 131,664,536.64
  5. Step 5: Solve for x
    x = 131,664,536.64/10,279.20
  6. Step 6: Final answer
    x = 12,808.83

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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.