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Finding the Fourth Proportional to 8,728, 12,044.54 and 5,191.14

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Solution

The fourth proportional to 8,728, 12,044.54 and 5,191.14 is: 7,163.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728 : 12,044.54 = 5,191.14 : x
  2. Step 2: Convert to fraction form
    8,728/12,044.54 = 5,191.14/x
  3. Step 3: Cross multiply
    8,728x = 12,044.54 × 5,191.14
  4. Step 4: Simplify right side
    8,728x = 62,524,893.38
  5. Step 5: Solve for x
    x = 62,524,893.38/8,728
  6. Step 6: Final answer
    x = 7,163.71

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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.