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Finding the Fourth Proportional to 8,601.72, 11,878.39 and 8,135.73

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Solution

The fourth proportional to 8,601.72, 11,878.39 and 8,135.73 is: 11,234.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,601.72 : 11,878.39 = 8,135.73 : x
  2. Step 2: Convert to fraction form
    8,601.72/11,878.39 = 8,135.73/x
  3. Step 3: Cross multiply
    8,601.72x = 11,878.39 × 8,135.73
  4. Step 4: Simplify right side
    8,601.72x = 96,639,373.87
  5. Step 5: Solve for x
    x = 96,639,373.87/8,601.72
  6. Step 6: Final answer
    x = 11,234.89

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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.