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Finding the Fourth Proportional to 38.87, 58.33 and 19.61

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Solution

The fourth proportional to 38.87, 58.33 and 19.61 is: 29.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38.87 : 58.33 = 19.61 : x
  2. Step 2: Convert to fraction form
    38.87/58.33 = 19.61/x
  3. Step 3: Cross multiply
    38.87x = 58.33 × 19.61
  4. Step 4: Simplify right side
    38.87x = 1,143.80
  5. Step 5: Solve for x
    x = 1,143.80/38.87
  6. Step 6: Final answer
    x = 29.43

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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.