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Finding the Fourth Proportional to 5,918.78, 8,878.17 and 5,557.92

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Solution

The fourth proportional to 5,918.78, 8,878.17 and 5,557.92 is: 8,336.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,918.78 : 8,878.17 = 5,557.92 : x
  2. Step 2: Convert to fraction form
    5,918.78/8,878.17 = 5,557.92/x
  3. Step 3: Cross multiply
    5,918.78x = 8,878.17 × 5,557.92
  4. Step 4: Simplify right side
    5,918.78x = 49,344,158.61
  5. Step 5: Solve for x
    x = 49,344,158.61/5,918.78
  6. Step 6: Final answer
    x = 8,336.89

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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.