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Finding the Fourth Proportional to 8,613.62, 12,909.42 and 7,498.48

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Solution

The fourth proportional to 8,613.62, 12,909.42 and 7,498.48 is: 11,238.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,613.62 : 12,909.42 = 7,498.48 : x
  2. Step 2: Convert to fraction form
    8,613.62/12,909.42 = 7,498.48/x
  3. Step 3: Cross multiply
    8,613.62x = 12,909.42 × 7,498.48
  4. Step 4: Simplify right side
    8,613.62x = 96,801,027.68
  5. Step 5: Solve for x
    x = 96,801,027.68/8,613.62
  6. Step 6: Final answer
    x = 11,238.14

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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.