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Finding the Fourth Proportional to 8,658.76, 11,951.49 and 5,123.92

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Solution

The fourth proportional to 8,658.76, 11,951.49 and 5,123.92 is: 7,072.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.76 : 11,951.49 = 5,123.92 : x
  2. Step 2: Convert to fraction form
    8,658.76/11,951.49 = 5,123.92/x
  3. Step 3: Cross multiply
    8,658.76x = 11,951.49 × 5,123.92
  4. Step 4: Simplify right side
    8,658.76x = 61,238,478.64
  5. Step 5: Solve for x
    x = 61,238,478.64/8,658.76
  6. Step 6: Final answer
    x = 7,072.43

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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.