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Finding the Fourth Proportional to 44.31, 66.42 and 18.62

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Solution

The fourth proportional to 44.31, 66.42 and 18.62 is: 27.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.31 : 66.42 = 18.62 : x
  2. Step 2: Convert to fraction form
    44.31/66.42 = 18.62/x
  3. Step 3: Cross multiply
    44.31x = 66.42 × 18.62
  4. Step 4: Simplify right side
    44.31x = 1,236.98
  5. Step 5: Solve for x
    x = 1,236.98/44.31
  6. Step 6: Final answer
    x = 27.92

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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.