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Finding the Fourth Proportional to 18.95, 28.29 and 16.55

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Solution

The fourth proportional to 18.95, 28.29 and 16.55 is: 24.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.95 : 28.29 = 16.55 : x
  2. Step 2: Convert to fraction form
    18.95/28.29 = 16.55/x
  3. Step 3: Cross multiply
    18.95x = 28.29 × 16.55
  4. Step 4: Simplify right side
    18.95x = 468.20
  5. Step 5: Solve for x
    x = 468.20/18.95
  6. Step 6: Final answer
    x = 24.71

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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.