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Finding the Fourth Proportional to 38.79, 58.17 and 27.36

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Solution

The fourth proportional to 38.79, 58.17 and 27.36 is: 41.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.79 : 58.17 = 27.36 : x
  2. Step 2: Convert to fraction form
    38.79/58.17 = 27.36/x
  3. Step 3: Cross multiply
    38.79x = 58.17 × 27.36
  4. Step 4: Simplify right side
    38.79x = 1,591.53
  5. Step 5: Solve for x
    x = 1,591.53/38.79
  6. Step 6: Final answer
    x = 41.03

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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.