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Finding the Fourth Proportional to 29.87, 41.22 and 20.15

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Solution

The fourth proportional to 29.87, 41.22 and 20.15 is: 27.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.87 : 41.22 = 20.15 : x
  2. Step 2: Convert to fraction form
    29.87/41.22 = 20.15/x
  3. Step 3: Cross multiply
    29.87x = 41.22 × 20.15
  4. Step 4: Simplify right side
    29.87x = 830.58
  5. Step 5: Solve for x
    x = 830.58/29.87
  6. Step 6: Final answer
    x = 27.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.