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Finding the Fourth Proportional to 28, 38.39 and 26.17

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Solution

The fourth proportional to 28, 38.39 and 26.17 is: 35.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28 : 38.39 = 26.17 : x
  2. Step 2: Convert to fraction form
    28/38.39 = 26.17/x
  3. Step 3: Cross multiply
    28x = 38.39 × 26.17
  4. Step 4: Simplify right side
    28x = 1,004.67
  5. Step 5: Solve for x
    x = 1,004.67/28
  6. Step 6: Final answer
    x = 35.88

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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.