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Finding the Fourth Proportional to 26.80, 36.94 and 19.88

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Solution

The fourth proportional to 26.80, 36.94 and 19.88 is: 27.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.80 : 36.94 = 19.88 : x
  2. Step 2: Convert to fraction form
    26.80/36.94 = 19.88/x
  3. Step 3: Cross multiply
    26.80x = 36.94 × 19.88
  4. Step 4: Simplify right side
    26.80x = 734.37
  5. Step 5: Solve for x
    x = 734.37/26.80
  6. Step 6: Final answer
    x = 27.40

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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.