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Finding the Fourth Proportional to 8,691.67, 13,005.20 and 5,183.58

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Solution

The fourth proportional to 8,691.67, 13,005.20 and 5,183.58 is: 7,756.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,691.67 : 13,005.20 = 5,183.58 : x
  2. Step 2: Convert to fraction form
    8,691.67/13,005.20 = 5,183.58/x
  3. Step 3: Cross multiply
    8,691.67x = 13,005.20 × 5,183.58
  4. Step 4: Simplify right side
    8,691.67x = 67,413,494.62
  5. Step 5: Solve for x
    x = 67,413,494.62/8,691.67
  6. Step 6: Final answer
    x = 7,756.10

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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.