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Finding the Fourth Proportional to 31.18, 46.79 and 15.97

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Solution

The fourth proportional to 31.18, 46.79 and 15.97 is: 23.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31.18 : 46.79 = 15.97 : x
  2. Step 2: Convert to fraction form
    31.18/46.79 = 15.97/x
  3. Step 3: Cross multiply
    31.18x = 46.79 × 15.97
  4. Step 4: Simplify right side
    31.18x = 746.92
  5. Step 5: Solve for x
    x = 746.92/31.18
  6. Step 6: Final answer
    x = 23.96

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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.