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Finding the Fourth Proportional to 8,367.36, 12,545.76 and 7,129.92

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Solution

The fourth proportional to 8,367.36, 12,545.76 and 7,129.92 is: 10,690.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,367.36 : 12,545.76 = 7,129.92 : x
  2. Step 2: Convert to fraction form
    8,367.36/12,545.76 = 7,129.92/x
  3. Step 3: Cross multiply
    8,367.36x = 12,545.76 × 7,129.92
  4. Step 4: Simplify right side
    8,367.36x = 89,450,265.14
  5. Step 5: Solve for x
    x = 89,450,265.14/8,367.36
  6. Step 6: Final answer
    x = 10,690.38

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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.