Home / 20,681.25-28,540.23-11,249.82

Finding the Fourth Proportional to 20,681.25, 28,540.23 and 11,249.82

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Solution

The fourth proportional to 20,681.25, 28,540.23 and 11,249.82 is: 15,524.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.25 : 28,540.23 = 11,249.82 : x
  2. Step 2: Convert to fraction form
    20,681.25/28,540.23 = 11,249.82/x
  3. Step 3: Cross multiply
    20,681.25x = 28,540.23 × 11,249.82
  4. Step 4: Simplify right side
    20,681.25x = 321,072,450.26
  5. Step 5: Solve for x
    x = 321,072,450.26/20,681.25
  6. Step 6: Final answer
    x = 15,524.81

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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.