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Finding the Fourth Proportional to 8,600.78, 12,901.16 and 5,678.39

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Solution

The fourth proportional to 8,600.78, 12,901.16 and 5,678.39 is: 8,517.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,600.78 : 12,901.16 = 5,678.39 : x
  2. Step 2: Convert to fraction form
    8,600.78/12,901.16 = 5,678.39/x
  3. Step 3: Cross multiply
    8,600.78x = 12,901.16 × 5,678.39
  4. Step 4: Simplify right side
    8,600.78x = 73,257,864.38
  5. Step 5: Solve for x
    x = 73,257,864.38/8,600.78
  6. Step 6: Final answer
    x = 8,517.58

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Half scale
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Similar ratio
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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.