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Finding the Fourth Proportional to 33.58, 50.34 and 12.20

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Solution

The fourth proportional to 33.58, 50.34 and 12.20 is: 18.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.58 : 50.34 = 12.20 : x
  2. Step 2: Convert to fraction form
    33.58/50.34 = 12.20/x
  3. Step 3: Cross multiply
    33.58x = 50.34 × 12.20
  4. Step 4: Simplify right side
    33.58x = 613.98
  5. Step 5: Solve for x
    x = 613.98/33.58
  6. Step 6: Final answer
    x = 18.29

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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.