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Finding the Fourth Proportional to 8,691.72, 13,037.44 and 2,117.89

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Solution

The fourth proportional to 8,691.72, 13,037.44 and 2,117.89 is: 3,176.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.72 : 13,037.44 = 2,117.89 : x
  2. Step 2: Convert to fraction form
    8,691.72/13,037.44 = 2,117.89/x
  3. Step 3: Cross multiply
    8,691.72x = 13,037.44 × 2,117.89
  4. Step 4: Simplify right side
    8,691.72x = 27,611,853.21
  5. Step 5: Solve for x
    x = 27,611,853.21/8,691.72
  6. Step 6: Final answer
    x = 3,176.80

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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.