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Finding the Fourth Proportional to 26.21, 36.20 and 18.46

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Solution

The fourth proportional to 26.21, 36.20 and 18.46 is: 25.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.21 : 36.20 = 18.46 : x
  2. Step 2: Convert to fraction form
    26.21/36.20 = 18.46/x
  3. Step 3: Cross multiply
    26.21x = 36.20 × 18.46
  4. Step 4: Simplify right side
    26.21x = 668.25
  5. Step 5: Solve for x
    x = 668.25/26.21
  6. Step 6: Final answer
    x = 25.50

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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.