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Finding the Fourth Proportional to 28.98, 39.97 and 18.06

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Solution

The fourth proportional to 28.98, 39.97 and 18.06 is: 24.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.98 : 39.97 = 18.06 : x
  2. Step 2: Convert to fraction form
    28.98/39.97 = 18.06/x
  3. Step 3: Cross multiply
    28.98x = 39.97 × 18.06
  4. Step 4: Simplify right side
    28.98x = 721.86
  5. Step 5: Solve for x
    x = 721.86/28.98
  6. Step 6: Final answer
    x = 24.91

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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.