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Finding the Fourth Proportional to 8.26, 11.42 and 6.64

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Solution

The fourth proportional to 8.26, 11.42 and 6.64 is: 9.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.26 : 11.42 = 6.64 : x
  2. Step 2: Convert to fraction form
    8.26/11.42 = 6.64/x
  3. Step 3: Cross multiply
    8.26x = 11.42 × 6.64
  4. Step 4: Simplify right side
    8.26x = 75.83
  5. Step 5: Solve for x
    x = 75.83/8.26
  6. Step 6: Final answer
    x = 9.18

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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.