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Finding the Fourth Proportional to 11.38, 17.06 and 6.87

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Solution

The fourth proportional to 11.38, 17.06 and 6.87 is: 10.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11.38 : 17.06 = 6.87 : x
  2. Step 2: Convert to fraction form
    11.38/17.06 = 6.87/x
  3. Step 3: Cross multiply
    11.38x = 17.06 × 6.87
  4. Step 4: Simplify right side
    11.38x = 117.20
  5. Step 5: Solve for x
    x = 117.20/11.38
  6. Step 6: Final answer
    x = 10.30

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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.