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Finding the Fourth Proportional to 18,478.56, 27,729.36 and 7,383.52

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Solution

The fourth proportional to 18,478.56, 27,729.36 and 7,383.52 is: 11,079.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,478.56 : 27,729.36 = 7,383.52 : x
  2. Step 2: Convert to fraction form
    18,478.56/27,729.36 = 7,383.52/x
  3. Step 3: Cross multiply
    18,478.56x = 27,729.36 × 7,383.52
  4. Step 4: Simplify right side
    18,478.56x = 204,740,284.15
  5. Step 5: Solve for x
    x = 204,740,284.15/18,478.56
  6. Step 6: Final answer
    x = 11,079.88

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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.