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Finding the Fourth Proportional to 8,545.28, 12,839.52 and 8,199.68

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Solution

The fourth proportional to 8,545.28, 12,839.52 and 8,199.68 is: 12,320.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,545.28 : 12,839.52 = 8,199.68 : x
  2. Step 2: Convert to fraction form
    8,545.28/12,839.52 = 8,199.68/x
  3. Step 3: Cross multiply
    8,545.28x = 12,839.52 × 8,199.68
  4. Step 4: Simplify right side
    8,545.28x = 105,279,955.35
  5. Step 5: Solve for x
    x = 105,279,955.35/8,545.28
  6. Step 6: Final answer
    x = 12,320.25

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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.