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Finding the Fourth Proportional to 18,229.87, 27,343.89 and 7,138.59

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Solution

The fourth proportional to 18,229.87, 27,343.89 and 7,138.59 is: 10,707.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,229.87 : 27,343.89 = 7,138.59 : x
  2. Step 2: Convert to fraction form
    18,229.87/27,343.89 = 7,138.59/x
  3. Step 3: Cross multiply
    18,229.87x = 27,343.89 × 7,138.59
  4. Step 4: Simplify right side
    18,229.87x = 195,196,819.72
  5. Step 5: Solve for x
    x = 195,196,819.72/18,229.87
  6. Step 6: Final answer
    x = 10,707.53

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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.