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Finding the Fourth Proportional to 24.20, 36.24 and 20.60

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Solution

The fourth proportional to 24.20, 36.24 and 20.60 is: 30.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.20 : 36.24 = 20.60 : x
  2. Step 2: Convert to fraction form
    24.20/36.24 = 20.60/x
  3. Step 3: Cross multiply
    24.20x = 36.24 × 20.60
  4. Step 4: Simplify right side
    24.20x = 746.54
  5. Step 5: Solve for x
    x = 746.54/24.20
  6. Step 6: Final answer
    x = 30.85

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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.