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Finding the Fourth Proportional to 26.21, 39.09 and 23.31

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Solution

The fourth proportional to 26.21, 39.09 and 23.31 is: 34.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.21 : 39.09 = 23.31 : x
  2. Step 2: Convert to fraction form
    26.21/39.09 = 23.31/x
  3. Step 3: Cross multiply
    26.21x = 39.09 × 23.31
  4. Step 4: Simplify right side
    26.21x = 911.19
  5. Step 5: Solve for x
    x = 911.19/26.21
  6. Step 6: Final answer
    x = 34.77

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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.