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Finding the Fourth Proportional to 41.30, 61.84 and 20.98

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Solution

The fourth proportional to 41.30, 61.84 and 20.98 is: 31.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.30 : 61.84 = 20.98 : x
  2. Step 2: Convert to fraction form
    41.30/61.84 = 20.98/x
  3. Step 3: Cross multiply
    41.30x = 61.84 × 20.98
  4. Step 4: Simplify right side
    41.30x = 1,297.40
  5. Step 5: Solve for x
    x = 1,297.40/41.30
  6. Step 6: Final answer
    x = 31.41

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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.