Home / 13,912.60-20,872.02-5,147.80

Finding the Fourth Proportional to 13,912.60, 20,872.02 and 5,147.80

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Solution

The fourth proportional to 13,912.60, 20,872.02 and 5,147.80 is: 7,722.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,912.60 : 20,872.02 = 5,147.80 : x
  2. Step 2: Convert to fraction form
    13,912.60/20,872.02 = 5,147.80/x
  3. Step 3: Cross multiply
    13,912.60x = 20,872.02 × 5,147.80
  4. Step 4: Simplify right side
    13,912.60x = 107,444,984.56
  5. Step 5: Solve for x
    x = 107,444,984.56/13,912.60
  6. Step 6: Final answer
    x = 7,722.85

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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.