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Finding the Fourth Proportional to 28.01, 42.21 and 26.27

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Solution

The fourth proportional to 28.01, 42.21 and 26.27 is: 39.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.01 : 42.21 = 26.27 : x
  2. Step 2: Convert to fraction form
    28.01/42.21 = 26.27/x
  3. Step 3: Cross multiply
    28.01x = 42.21 × 26.27
  4. Step 4: Simplify right side
    28.01x = 1,108.65
  5. Step 5: Solve for x
    x = 1,108.65/28.01
  6. Step 6: Final answer
    x = 39.59

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.