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Finding the Fourth Proportional to 24.55, 33.80 and 21.97

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Solution

The fourth proportional to 24.55, 33.80 and 21.97 is: 30.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.55 : 33.80 = 21.97 : x
  2. Step 2: Convert to fraction form
    24.55/33.80 = 21.97/x
  3. Step 3: Cross multiply
    24.55x = 33.80 × 21.97
  4. Step 4: Simplify right side
    24.55x = 742.52
  5. Step 5: Solve for x
    x = 742.52/24.55
  6. Step 6: Final answer
    x = 30.25

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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.