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Finding the Fourth Proportional to 26.88, 36.92 and 25.40

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Solution

The fourth proportional to 26.88, 36.92 and 25.40 is: 34.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.88 : 36.92 = 25.40 : x
  2. Step 2: Convert to fraction form
    26.88/36.92 = 25.40/x
  3. Step 3: Cross multiply
    26.88x = 36.92 × 25.40
  4. Step 4: Simplify right side
    26.88x = 937.46
  5. Step 5: Solve for x
    x = 937.46/26.88
  6. Step 6: Final answer
    x = 34.88

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.