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Finding the Fourth Proportional to 18.18, 27.12 and 16.67

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Solution

The fourth proportional to 18.18, 27.12 and 16.67 is: 24.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.18 : 27.12 = 16.67 : x
  2. Step 2: Convert to fraction form
    18.18/27.12 = 16.67/x
  3. Step 3: Cross multiply
    18.18x = 27.12 × 16.67
  4. Step 4: Simplify right side
    18.18x = 451.95
  5. Step 5: Solve for x
    x = 451.95/18.18
  6. Step 6: Final answer
    x = 24.86

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.