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Finding the Fourth Proportional to 24.81, 34.25 and 18.68

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Solution

The fourth proportional to 24.81, 34.25 and 18.68 is: 25.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    24.81 : 34.25 = 18.68 : x
  2. Step 2: Convert to fraction form
    24.81/34.25 = 18.68/x
  3. Step 3: Cross multiply
    24.81x = 34.25 × 18.68
  4. Step 4: Simplify right side
    24.81x = 639.53
  5. Step 5: Solve for x
    x = 639.53/24.81
  6. Step 6: Final answer
    x = 25.78

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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.