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Finding the Fourth Proportional to 24.33, 33.58 and 20.87

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Solution

The fourth proportional to 24.33, 33.58 and 20.87 is: 28.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.33 : 33.58 = 20.87 : x
  2. Step 2: Convert to fraction form
    24.33/33.58 = 20.87/x
  3. Step 3: Cross multiply
    24.33x = 33.58 × 20.87
  4. Step 4: Simplify right side
    24.33x = 700.85
  5. Step 5: Solve for x
    x = 700.85/24.33
  6. Step 6: Final answer
    x = 28.81

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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.