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Finding the Fourth Proportional to 10.79, 16.17 and 10.55

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Solution

The fourth proportional to 10.79, 16.17 and 10.55 is: 15.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    10.79 : 16.17 = 10.55 : x
  2. Step 2: Convert to fraction form
    10.79/16.17 = 10.55/x
  3. Step 3: Cross multiply
    10.79x = 16.17 × 10.55
  4. Step 4: Simplify right side
    10.79x = 170.51
  5. Step 5: Solve for x
    x = 170.51/10.79
  6. Step 6: Final answer
    x = 15.81

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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.