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Finding the Fourth Proportional to 8,129, 11,217.12 and 4,591.46

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Solution

The fourth proportional to 8,129, 11,217.12 and 4,591.46 is: 6,335.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129 : 11,217.12 = 4,591.46 : x
  2. Step 2: Convert to fraction form
    8,129/11,217.12 = 4,591.46/x
  3. Step 3: Cross multiply
    8,129x = 11,217.12 × 4,591.46
  4. Step 4: Simplify right side
    8,129x = 51,502,957.80
  5. Step 5: Solve for x
    x = 51,502,957.80/8,129
  6. Step 6: Final answer
    x = 6,335.71

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Half scale
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Double scale
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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.