Home / 13,986.27-20,979.60-4,125.75

Finding the Fourth Proportional to 13,986.27, 20,979.60 and 4,125.75

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Solution

The fourth proportional to 13,986.27, 20,979.60 and 4,125.75 is: 6,188.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.27 : 20,979.60 = 4,125.75 : x
  2. Step 2: Convert to fraction form
    13,986.27/20,979.60 = 4,125.75/x
  3. Step 3: Cross multiply
    13,986.27x = 20,979.60 × 4,125.75
  4. Step 4: Simplify right side
    13,986.27x = 86,556,584.70
  5. Step 5: Solve for x
    x = 86,556,584.70/13,986.27
  6. Step 6: Final answer
    x = 6,188.68

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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.