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Finding the Fourth Proportional to 26.00, 38.90 and 20.94

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Solution

The fourth proportional to 26.00, 38.90 and 20.94 is: 31.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.00 : 38.90 = 20.94 : x
  2. Step 2: Convert to fraction form
    26.00/38.90 = 20.94/x
  3. Step 3: Cross multiply
    26.00x = 38.90 × 20.94
  4. Step 4: Simplify right side
    26.00x = 814.62
  5. Step 5: Solve for x
    x = 814.62/26.00
  6. Step 6: Final answer
    x = 31.33

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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.