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Finding the Fourth Proportional to 18,766.71, 28,150.11 and 15,239.97

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Solution

The fourth proportional to 18,766.71, 28,150.11 and 15,239.97 is: 22,859.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,766.71 : 28,150.11 = 15,239.97 : x
  2. Step 2: Convert to fraction form
    18,766.71/28,150.11 = 15,239.97/x
  3. Step 3: Cross multiply
    18,766.71x = 28,150.11 × 15,239.97
  4. Step 4: Simplify right side
    18,766.71x = 429,006,831.90
  5. Step 5: Solve for x
    x = 429,006,831.90/18,766.71
  6. Step 6: Final answer
    x = 22,859.99

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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.