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Finding the Fourth Proportional to 26.21, 36.16 and 18.44

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Solution

The fourth proportional to 26.21, 36.16 and 18.44 is: 25.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.21 : 36.16 = 18.44 : x
  2. Step 2: Convert to fraction form
    26.21/36.16 = 18.44/x
  3. Step 3: Cross multiply
    26.21x = 36.16 × 18.44
  4. Step 4: Simplify right side
    26.21x = 666.52
  5. Step 5: Solve for x
    x = 666.52/26.21
  6. Step 6: Final answer
    x = 25.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.