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Finding the Fourth Proportional to 18,478.35, 27,721.17 and 5,330.88

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Solution

The fourth proportional to 18,478.35, 27,721.17 and 5,330.88 is: 7,997.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.35 : 27,721.17 = 5,330.88 : x
  2. Step 2: Convert to fraction form
    18,478.35/27,721.17 = 5,330.88/x
  3. Step 3: Cross multiply
    18,478.35x = 27,721.17 × 5,330.88
  4. Step 4: Simplify right side
    18,478.35x = 147,778,230.73
  5. Step 5: Solve for x
    x = 147,778,230.73/18,478.35
  6. Step 6: Final answer
    x = 7,997.37

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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.