Home / 13,728.25-20,584.58-5,403.75

Finding the Fourth Proportional to 13,728.25, 20,584.58 and 5,403.75

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Solution

The fourth proportional to 13,728.25, 20,584.58 and 5,403.75 is: 8,102.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,728.25 : 20,584.58 = 5,403.75 : x
  2. Step 2: Convert to fraction form
    13,728.25/20,584.58 = 5,403.75/x
  3. Step 3: Cross multiply
    13,728.25x = 20,584.58 × 5,403.75
  4. Step 4: Simplify right side
    13,728.25x = 111,233,974.35
  5. Step 5: Solve for x
    x = 111,233,974.35/13,728.25
  6. Step 6: Final answer
    x = 8,102.56

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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.