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Finding the Fourth Proportional to 8.89, 13.31 and 6.74

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Solution

The fourth proportional to 8.89, 13.31 and 6.74 is: 10.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8.89 : 13.31 = 6.74 : x
  2. Step 2: Convert to fraction form
    8.89/13.31 = 6.74/x
  3. Step 3: Cross multiply
    8.89x = 13.31 × 6.74
  4. Step 4: Simplify right side
    8.89x = 89.71
  5. Step 5: Solve for x
    x = 89.71/8.89
  6. Step 6: Final answer
    x = 10.09

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.