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Finding the Fourth Proportional to 26.57, 36.68 and 20.45

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Solution

The fourth proportional to 26.57, 36.68 and 20.45 is: 28.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    26.57 : 36.68 = 20.45 : x
  2. Step 2: Convert to fraction form
    26.57/36.68 = 20.45/x
  3. Step 3: Cross multiply
    26.57x = 36.68 × 20.45
  4. Step 4: Simplify right side
    26.57x = 750.11
  5. Step 5: Solve for x
    x = 750.11/26.57
  6. Step 6: Final answer
    x = 28.23

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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.