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Finding the Fourth Proportional to 9.29, 12.80 and 8.27

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Solution

The fourth proportional to 9.29, 12.80 and 8.27 is: 11.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    9.29 : 12.80 = 8.27 : x
  2. Step 2: Convert to fraction form
    9.29/12.80 = 8.27/x
  3. Step 3: Cross multiply
    9.29x = 12.80 × 8.27
  4. Step 4: Simplify right side
    9.29x = 105.75
  5. Step 5: Solve for x
    x = 105.75/9.29
  6. Step 6: Final answer
    x = 11.39

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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.