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Finding the Fourth Proportional to 18.12, 25.17 and 17.94

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Solution

The fourth proportional to 18.12, 25.17 and 17.94 is: 24.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.12 : 25.17 = 17.94 : x
  2. Step 2: Convert to fraction form
    18.12/25.17 = 17.94/x
  3. Step 3: Cross multiply
    18.12x = 25.17 × 17.94
  4. Step 4: Simplify right side
    18.12x = 451.55
  5. Step 5: Solve for x
    x = 451.55/18.12
  6. Step 6: Final answer
    x = 24.92

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.