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Finding the Fourth Proportional to 18,747.71, 28,122.78 and 9,384.92

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Solution

The fourth proportional to 18,747.71, 28,122.78 and 9,384.92 is: 14,077.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,747.71 : 28,122.78 = 9,384.92 : x
  2. Step 2: Convert to fraction form
    18,747.71/28,122.78 = 9,384.92/x
  3. Step 3: Cross multiply
    18,747.71x = 28,122.78 × 9,384.92
  4. Step 4: Simplify right side
    18,747.71x = 263,930,040.48
  5. Step 5: Solve for x
    x = 263,930,040.48/18,747.71
  6. Step 6: Final answer
    x = 14,077.99

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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.