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Finding the Fourth Proportional to 26.80, 36.91 and 26.30

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Solution

The fourth proportional to 26.80, 36.91 and 26.30 is: 36.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.80 : 36.91 = 26.30 : x
  2. Step 2: Convert to fraction form
    26.80/36.91 = 26.30/x
  3. Step 3: Cross multiply
    26.80x = 36.91 × 26.30
  4. Step 4: Simplify right side
    26.80x = 970.73
  5. Step 5: Solve for x
    x = 970.73/26.80
  6. Step 6: Final answer
    x = 36.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.