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Finding the Fourth Proportional to 44.28, 66.41 and 13.85

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Solution

The fourth proportional to 44.28, 66.41 and 13.85 is: 20.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.28 : 66.41 = 13.85 : x
  2. Step 2: Convert to fraction form
    44.28/66.41 = 13.85/x
  3. Step 3: Cross multiply
    44.28x = 66.41 × 13.85
  4. Step 4: Simplify right side
    44.28x = 919.38
  5. Step 5: Solve for x
    x = 919.38/44.28
  6. Step 6: Final answer
    x = 20.76

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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.