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Finding the Fourth Proportional to 26.07, 38.89 and 25.80

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Solution

The fourth proportional to 26.07, 38.89 and 25.80 is: 38.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.07 : 38.89 = 25.80 : x
  2. Step 2: Convert to fraction form
    26.07/38.89 = 25.80/x
  3. Step 3: Cross multiply
    26.07x = 38.89 × 25.80
  4. Step 4: Simplify right side
    26.07x = 1,003.36
  5. Step 5: Solve for x
    x = 1,003.36/26.07
  6. Step 6: Final answer
    x = 38.49

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.