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Finding the Fourth Proportional to 44.67, 66.99 and 20.61

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Solution

The fourth proportional to 44.67, 66.99 and 20.61 is: 30.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.67 : 66.99 = 20.61 : x
  2. Step 2: Convert to fraction form
    44.67/66.99 = 20.61/x
  3. Step 3: Cross multiply
    44.67x = 66.99 × 20.61
  4. Step 4: Simplify right side
    44.67x = 1,380.66
  5. Step 5: Solve for x
    x = 1,380.66/44.67
  6. Step 6: Final answer
    x = 30.91

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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.