Home / 13,816.75-20,725.03-3,428.50

Finding the Fourth Proportional to 13,816.75, 20,725.03 and 3,428.50

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Solution

The fourth proportional to 13,816.75, 20,725.03 and 3,428.50 is: 5,142.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,816.75 : 20,725.03 = 3,428.50 : x
  2. Step 2: Convert to fraction form
    13,816.75/20,725.03 = 3,428.50/x
  3. Step 3: Cross multiply
    13,816.75x = 20,725.03 × 3,428.50
  4. Step 4: Simplify right side
    13,816.75x = 71,055,765.36
  5. Step 5: Solve for x
    x = 71,055,765.36/13,816.75
  6. Step 6: Final answer
    x = 5,142.73

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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.