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Finding the Fourth Proportional to 33.81, 50.76 and 20.34

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Solution

The fourth proportional to 33.81, 50.76 and 20.34 is: 30.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.81 : 50.76 = 20.34 : x
  2. Step 2: Convert to fraction form
    33.81/50.76 = 20.34/x
  3. Step 3: Cross multiply
    33.81x = 50.76 × 20.34
  4. Step 4: Simplify right side
    33.81x = 1,032.46
  5. Step 5: Solve for x
    x = 1,032.46/33.81
  6. Step 6: Final answer
    x = 30.54

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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.