Home / 20,391.94-30,578.03-11,961.20

Finding the Fourth Proportional to 20,391.94, 30,578.03 and 11,961.20

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Solution

The fourth proportional to 20,391.94, 30,578.03 and 11,961.20 is: 17,936.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,391.94 : 30,578.03 = 11,961.20 : x
  2. Step 2: Convert to fraction form
    20,391.94/30,578.03 = 11,961.20/x
  3. Step 3: Cross multiply
    20,391.94x = 30,578.03 × 11,961.20
  4. Step 4: Simplify right side
    20,391.94x = 365,749,932.44
  5. Step 5: Solve for x
    x = 365,749,932.44/20,391.94
  6. Step 6: Final answer
    x = 17,936.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.