Home / 20,571.78-28,388.55-11,619

Finding the Fourth Proportional to 20,571.78, 28,388.55 and 11,619

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Solution

The fourth proportional to 20,571.78, 28,388.55 and 11,619 is: 16,033.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.78 : 28,388.55 = 11,619 : x
  2. Step 2: Convert to fraction form
    20,571.78/28,388.55 = 11,619/x
  3. Step 3: Cross multiply
    20,571.78x = 28,388.55 × 11,619
  4. Step 4: Simplify right side
    20,571.78x = 329,846,562.45
  5. Step 5: Solve for x
    x = 329,846,562.45/20,571.78
  6. Step 6: Final answer
    x = 16,033.93

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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.