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Finding the Fourth Proportional to 8,819.17, 12,168.18 and 5,279.87

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Solution

The fourth proportional to 8,819.17, 12,168.18 and 5,279.87 is: 7,284.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.17 : 12,168.18 = 5,279.87 : x
  2. Step 2: Convert to fraction form
    8,819.17/12,168.18 = 5,279.87/x
  3. Step 3: Cross multiply
    8,819.17x = 12,168.18 × 5,279.87
  4. Step 4: Simplify right side
    8,819.17x = 64,246,438.96
  5. Step 5: Solve for x
    x = 64,246,438.96/8,819.17
  6. Step 6: Final answer
    x = 7,284.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.