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Finding the Fourth Proportional to 8,781.62, 12,118.87 and 5,246.88

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Solution

The fourth proportional to 8,781.62, 12,118.87 and 5,246.88 is: 7,240.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.62 : 12,118.87 = 5,246.88 : x
  2. Step 2: Convert to fraction form
    8,781.62/12,118.87 = 5,246.88/x
  3. Step 3: Cross multiply
    8,781.62x = 12,118.87 × 5,246.88
  4. Step 4: Simplify right side
    8,781.62x = 63,586,188.22
  5. Step 5: Solve for x
    x = 63,586,188.22/8,781.62
  6. Step 6: Final answer
    x = 7,240.83

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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.