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Finding the Fourth Proportional to 24.81, 34.28 and 21.35

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Solution

The fourth proportional to 24.81, 34.28 and 21.35 is: 29.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.81 : 34.28 = 21.35 : x
  2. Step 2: Convert to fraction form
    24.81/34.28 = 21.35/x
  3. Step 3: Cross multiply
    24.81x = 34.28 × 21.35
  4. Step 4: Simplify right side
    24.81x = 731.60
  5. Step 5: Solve for x
    x = 731.60/24.81
  6. Step 6: Final answer
    x = 29.49

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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.