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Finding the Fourth Proportional to 33.85, 50.77 and 21.83

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Solution

The fourth proportional to 33.85, 50.77 and 21.83 is: 32.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    33.85 : 50.77 = 21.83 : x
  2. Step 2: Convert to fraction form
    33.85/50.77 = 21.83/x
  3. Step 3: Cross multiply
    33.85x = 50.77 × 21.83
  4. Step 4: Simplify right side
    33.85x = 1,108.31
  5. Step 5: Solve for x
    x = 1,108.31/33.85
  6. Step 6: Final answer
    x = 32.75

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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.