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Finding the Fourth Proportional to 24.53, 33.86 and 20.43

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Solution

The fourth proportional to 24.53, 33.86 and 20.43 is: 28.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.53 : 33.86 = 20.43 : x
  2. Step 2: Convert to fraction form
    24.53/33.86 = 20.43/x
  3. Step 3: Cross multiply
    24.53x = 33.86 × 20.43
  4. Step 4: Simplify right side
    24.53x = 691.66
  5. Step 5: Solve for x
    x = 691.66/24.53
  6. Step 6: Final answer
    x = 28.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.