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Finding the Fourth Proportional to 17.86, 26.82 and 10.78

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Solution

The fourth proportional to 17.86, 26.82 and 10.78 is: 16.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    17.86 : 26.82 = 10.78 : x
  2. Step 2: Convert to fraction form
    17.86/26.82 = 10.78/x
  3. Step 3: Cross multiply
    17.86x = 26.82 × 10.78
  4. Step 4: Simplify right side
    17.86x = 289.12
  5. Step 5: Solve for x
    x = 289.12/17.86
  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.