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Finding the Fourth Proportional to 46.67, 69.98 and 20.97

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Solution

The fourth proportional to 46.67, 69.98 and 20.97 is: 31.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.67 : 69.98 = 20.97 : x
  2. Step 2: Convert to fraction form
    46.67/69.98 = 20.97/x
  3. Step 3: Cross multiply
    46.67x = 69.98 × 20.97
  4. Step 4: Simplify right side
    46.67x = 1,467.38
  5. Step 5: Solve for x
    x = 1,467.38/46.67
  6. Step 6: Final answer
    x = 31.44

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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.