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Finding the Fourth Proportional to 18,738.62, 28,105.20 and 6,258.62

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Solution

The fourth proportional to 18,738.62, 28,105.20 and 6,258.62 is: 9,387.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,738.62 : 28,105.20 = 6,258.62 : x
  2. Step 2: Convert to fraction form
    18,738.62/28,105.20 = 6,258.62/x
  3. Step 3: Cross multiply
    18,738.62x = 28,105.20 × 6,258.62
  4. Step 4: Simplify right side
    18,738.62x = 175,899,766.82
  5. Step 5: Solve for x
    x = 175,899,766.82/18,738.62
  6. Step 6: Final answer
    x = 9,387.02

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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.