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Finding the Fourth Proportional to 29.81, 41.15 and 20.14

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Solution

The fourth proportional to 29.81, 41.15 and 20.14 is: 27.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    29.81 : 41.15 = 20.14 : x
  2. Step 2: Convert to fraction form
    29.81/41.15 = 20.14/x
  3. Step 3: Cross multiply
    29.81x = 41.15 × 20.14
  4. Step 4: Simplify right side
    29.81x = 828.71
  5. Step 5: Solve for x
    x = 828.71/29.81
  6. Step 6: Final answer
    x = 27.80

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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.