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Finding the Fourth Proportional to 10.81, 16.08 and 10.17

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Solution

The fourth proportional to 10.81, 16.08 and 10.17 is: 15.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.81 : 16.08 = 10.17 : x
  2. Step 2: Convert to fraction form
    10.81/16.08 = 10.17/x
  3. Step 3: Cross multiply
    10.81x = 16.08 × 10.17
  4. Step 4: Simplify right side
    10.81x = 163.56
  5. Step 5: Solve for x
    x = 163.56/10.81
  6. Step 6: Final answer
    x = 15.13

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.