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Finding the Fourth Proportional to 33.95, 50.91 and 12.57

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Solution

The fourth proportional to 33.95, 50.91 and 12.57 is: 18.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.95 : 50.91 = 12.57 : x
  2. Step 2: Convert to fraction form
    33.95/50.91 = 12.57/x
  3. Step 3: Cross multiply
    33.95x = 50.91 × 12.57
  4. Step 4: Simplify right side
    33.95x = 639.94
  5. Step 5: Solve for x
    x = 639.94/33.95
  6. Step 6: Final answer
    x = 18.85

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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.