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Finding the Fourth Proportional to 8,697.62, 12,002.49 and 5,160.75

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Solution

The fourth proportional to 8,697.62, 12,002.49 and 5,160.75 is: 7,121.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,697.62 : 12,002.49 = 5,160.75 : x
  2. Step 2: Convert to fraction form
    8,697.62/12,002.49 = 5,160.75/x
  3. Step 3: Cross multiply
    8,697.62x = 12,002.49 × 5,160.75
  4. Step 4: Simplify right side
    8,697.62x = 61,941,850.27
  5. Step 5: Solve for x
    x = 61,941,850.27/8,697.62
  6. Step 6: Final answer
    x = 7,121.71

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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.