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Finding the Fourth Proportional to 8,422.92, 12,624.84 and 5,305.14

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Solution

The fourth proportional to 8,422.92, 12,624.84 and 5,305.14 is: 7,951.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,422.92 : 12,624.84 = 5,305.14 : x
  2. Step 2: Convert to fraction form
    8,422.92/12,624.84 = 5,305.14/x
  3. Step 3: Cross multiply
    8,422.92x = 12,624.84 × 5,305.14
  4. Step 4: Simplify right side
    8,422.92x = 66,976,543.68
  5. Step 5: Solve for x
    x = 66,976,543.68/8,422.92
  6. Step 6: Final answer
    x = 7,951.70

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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.