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Finding the Fourth Proportional to 57.87, 86.82 and 19.36

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Solution

The fourth proportional to 57.87, 86.82 and 19.36 is: 29.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    57.87 : 86.82 = 19.36 : x
  2. Step 2: Convert to fraction form
    57.87/86.82 = 19.36/x
  3. Step 3: Cross multiply
    57.87x = 86.82 × 19.36
  4. Step 4: Simplify right side
    57.87x = 1,680.49
  5. Step 5: Solve for x
    x = 1,680.49/57.87
  6. Step 6: Final answer
    x = 29.04

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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.