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Finding the Fourth Proportional to 41.36, 61.98 and 21.06

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Solution

The fourth proportional to 41.36, 61.98 and 21.06 is: 31.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.36 : 61.98 = 21.06 : x
  2. Step 2: Convert to fraction form
    41.36/61.98 = 21.06/x
  3. Step 3: Cross multiply
    41.36x = 61.98 × 21.06
  4. Step 4: Simplify right side
    41.36x = 1,305.30
  5. Step 5: Solve for x
    x = 1,305.30/41.36
  6. Step 6: Final answer
    x = 31.56

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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.