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Finding the Fourth Proportional to 16.05, 22.09 and 11.89

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Solution

The fourth proportional to 16.05, 22.09 and 11.89 is: 16.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.05 : 22.09 = 11.89 : x
  2. Step 2: Convert to fraction form
    16.05/22.09 = 11.89/x
  3. Step 3: Cross multiply
    16.05x = 22.09 × 11.89
  4. Step 4: Simplify right side
    16.05x = 262.65
  5. Step 5: Solve for x
    x = 262.65/16.05
  6. Step 6: Final answer
    x = 16.36

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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.