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Finding the Fourth Proportional to 8,687.52, 12,000.29 and 6,658.61

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Solution

The fourth proportional to 8,687.52, 12,000.29 and 6,658.61 is: 9,197.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.52 : 12,000.29 = 6,658.61 : x
  2. Step 2: Convert to fraction form
    8,687.52/12,000.29 = 6,658.61/x
  3. Step 3: Cross multiply
    8,687.52x = 12,000.29 × 6,658.61
  4. Step 4: Simplify right side
    8,687.52x = 79,905,157.70
  5. Step 5: Solve for x
    x = 79,905,157.70/8,687.52
  6. Step 6: Final answer
    x = 9,197.69

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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.