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Finding the Fourth Proportional to 16.49, 22.79 and 12.84

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Solution

The fourth proportional to 16.49, 22.79 and 12.84 is: 17.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.49 : 22.79 = 12.84 : x
  2. Step 2: Convert to fraction form
    16.49/22.79 = 12.84/x
  3. Step 3: Cross multiply
    16.49x = 22.79 × 12.84
  4. Step 4: Simplify right side
    16.49x = 292.56
  5. Step 5: Solve for x
    x = 292.56/16.49
  6. Step 6: Final answer
    x = 17.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.