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Finding the Fourth Proportional to 12,614.60, 18,900.30 and 8,229.80

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Solution

The fourth proportional to 12,614.60, 18,900.30 and 8,229.80 is: 12,330.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,614.60 : 18,900.30 = 8,229.80 : x
  2. Step 2: Convert to fraction form
    12,614.60/18,900.30 = 8,229.80/x
  3. Step 3: Cross multiply
    12,614.60x = 18,900.30 × 8,229.80
  4. Step 4: Simplify right side
    12,614.60x = 155,545,688.94
  5. Step 5: Solve for x
    x = 155,545,688.94/12,614.60
  6. Step 6: Final answer
    x = 12,330.61

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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.