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Finding the Fourth Proportional to 11.97, 16.52 and 8.90

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Solution

The fourth proportional to 11.97, 16.52 and 8.90 is: 12.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.97 : 16.52 = 8.90 : x
  2. Step 2: Convert to fraction form
    11.97/16.52 = 8.90/x
  3. Step 3: Cross multiply
    11.97x = 16.52 × 8.90
  4. Step 4: Simplify right side
    11.97x = 146.90
  5. Step 5: Solve for x
    x = 146.90/11.97
  6. Step 6: Final answer
    x = 12.27

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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.