Home / 20,121.31-27,770.73-11,171.68

Finding the Fourth Proportional to 20,121.31, 27,770.73 and 11,171.68

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Solution

The fourth proportional to 20,121.31, 27,770.73 and 11,171.68 is: 15,418.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.31 : 27,770.73 = 11,171.68 : x
  2. Step 2: Convert to fraction form
    20,121.31/27,770.73 = 11,171.68/x
  3. Step 3: Cross multiply
    20,121.31x = 27,770.73 × 11,171.68
  4. Step 4: Simplify right side
    20,121.31x = 310,245,708.93
  5. Step 5: Solve for x
    x = 310,245,708.93/20,121.31
  6. Step 6: Final answer
    x = 15,418.76

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1.5x scale

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.