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Finding the Fourth Proportional to 41.01, 61.51 and 20.74

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Solution

The fourth proportional to 41.01, 61.51 and 20.74 is: 31.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.01 : 61.51 = 20.74 : x
  2. Step 2: Convert to fraction form
    41.01/61.51 = 20.74/x
  3. Step 3: Cross multiply
    41.01x = 61.51 × 20.74
  4. Step 4: Simplify right side
    41.01x = 1,275.41
  5. Step 5: Solve for x
    x = 1,275.41/41.01
  6. Step 6: Final answer
    x = 31.10

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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.