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Finding the Fourth Proportional to 44.13, 66.21 and 19.74

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Solution

The fourth proportional to 44.13, 66.21 and 19.74 is: 29.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.13 : 66.21 = 19.74 : x
  2. Step 2: Convert to fraction form
    44.13/66.21 = 19.74/x
  3. Step 3: Cross multiply
    44.13x = 66.21 × 19.74
  4. Step 4: Simplify right side
    44.13x = 1,306.80
  5. Step 5: Solve for x
    x = 1,306.80/44.13
  6. Step 6: Final answer
    x = 29.62

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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.