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Finding the Fourth Proportional to 18.17, 27.21 and 14.55

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Solution

The fourth proportional to 18.17, 27.21 and 14.55 is: 21.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.17 : 27.21 = 14.55 : x
  2. Step 2: Convert to fraction form
    18.17/27.21 = 14.55/x
  3. Step 3: Cross multiply
    18.17x = 27.21 × 14.55
  4. Step 4: Simplify right side
    18.17x = 395.91
  5. Step 5: Solve for x
    x = 395.91/18.17
  6. Step 6: Final answer
    x = 21.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.