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Finding the Fourth Proportional to 18.76, 28.02 and 16.95

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Solution

The fourth proportional to 18.76, 28.02 and 16.95 is: 25.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18.76 : 28.02 = 16.95 : x
  2. Step 2: Convert to fraction form
    18.76/28.02 = 16.95/x
  3. Step 3: Cross multiply
    18.76x = 28.02 × 16.95
  4. Step 4: Simplify right side
    18.76x = 474.78
  5. Step 5: Solve for x
    x = 474.78/18.76
  6. Step 6: Final answer
    x = 25.32

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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.