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Finding the Fourth Proportional to 16.55, 22.85 and 15.18

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Solution

The fourth proportional to 16.55, 22.85 and 15.18 is: 20.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.55 : 22.85 = 15.18 : x
  2. Step 2: Convert to fraction form
    16.55/22.85 = 15.18/x
  3. Step 3: Cross multiply
    16.55x = 22.85 × 15.18
  4. Step 4: Simplify right side
    16.55x = 346.86
  5. Step 5: Solve for x
    x = 346.86/16.55
  6. Step 6: Final answer
    x = 20.96

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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.