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Finding the Fourth Proportional to 16.74, 23.22 and 15.75

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Solution

The fourth proportional to 16.74, 23.22 and 15.75 is: 21.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.74 : 23.22 = 15.75 : x
  2. Step 2: Convert to fraction form
    16.74/23.22 = 15.75/x
  3. Step 3: Cross multiply
    16.74x = 23.22 × 15.75
  4. Step 4: Simplify right side
    16.74x = 365.72
  5. Step 5: Solve for x
    x = 365.72/16.74
  6. Step 6: Final answer
    x = 21.85

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.