Home / 13,879.20-20,829.75-5,120.27

Finding the Fourth Proportional to 13,879.20, 20,829.75 and 5,120.27

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Solution

The fourth proportional to 13,879.20, 20,829.75 and 5,120.27 is: 7,684.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,879.20 : 20,829.75 = 5,120.27 : x
  2. Step 2: Convert to fraction form
    13,879.20/20,829.75 = 5,120.27/x
  3. Step 3: Cross multiply
    13,879.20x = 20,829.75 × 5,120.27
  4. Step 4: Simplify right side
    13,879.20x = 106,653,839.88
  5. Step 5: Solve for x
    x = 106,653,839.88/13,879.20
  6. Step 6: Final answer
    x = 7,684.44

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1.5x scale

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.