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Finding the Fourth Proportional to 38.38, 57.55 and 12.69

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Solution

The fourth proportional to 38.38, 57.55 and 12.69 is: 19.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.38 : 57.55 = 12.69 : x
  2. Step 2: Convert to fraction form
    38.38/57.55 = 12.69/x
  3. Step 3: Cross multiply
    38.38x = 57.55 × 12.69
  4. Step 4: Simplify right side
    38.38x = 730.31
  5. Step 5: Solve for x
    x = 730.31/38.38
  6. Step 6: Final answer
    x = 19.03

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.