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Finding the Fourth Proportional to 13.76, 20.75 and 12.27

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Solution

The fourth proportional to 13.76, 20.75 and 12.27 is: 18.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13.76 : 20.75 = 12.27 : x
  2. Step 2: Convert to fraction form
    13.76/20.75 = 12.27/x
  3. Step 3: Cross multiply
    13.76x = 20.75 × 12.27
  4. Step 4: Simplify right side
    13.76x = 254.63
  5. Step 5: Solve for x
    x = 254.63/13.76
  6. Step 6: Final answer
    x = 18.51

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1.5x scale

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.