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Finding the Fourth Proportional to 26.81, 40.24 and 10.79

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Solution

The fourth proportional to 26.81, 40.24 and 10.79 is: 16.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.81 : 40.24 = 10.79 : x
  2. Step 2: Convert to fraction form
    26.81/40.24 = 10.79/x
  3. Step 3: Cross multiply
    26.81x = 40.24 × 10.79
  4. Step 4: Simplify right side
    26.81x = 434.09
  5. Step 5: Solve for x
    x = 434.09/26.81
  6. Step 6: Final answer
    x = 16.19

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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.