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Finding the Fourth Proportional to 28.22, 38.73 and 26.40

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Solution

The fourth proportional to 28.22, 38.73 and 26.40 is: 36.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.22 : 38.73 = 26.40 : x
  2. Step 2: Convert to fraction form
    28.22/38.73 = 26.40/x
  3. Step 3: Cross multiply
    28.22x = 38.73 × 26.40
  4. Step 4: Simplify right side
    28.22x = 1,022.47
  5. Step 5: Solve for x
    x = 1,022.47/28.22
  6. Step 6: Final answer
    x = 36.23

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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.