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Finding the Fourth Proportional to 34, 50.88 and 21.91

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Solution

The fourth proportional to 34, 50.88 and 21.91 is: 32.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    34 : 50.88 = 21.91 : x
  2. Step 2: Convert to fraction form
    34/50.88 = 21.91/x
  3. Step 3: Cross multiply
    34x = 50.88 × 21.91
  4. Step 4: Simplify right side
    34x = 1,114.78
  5. Step 5: Solve for x
    x = 1,114.78/34
  6. Step 6: Final answer
    x = 32.79

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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.