Home / 8,320.26-12,481.60-3,390.20

Finding the Fourth Proportional to 8,320.26, 12,481.60 and 3,390.20

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Solution

The fourth proportional to 8,320.26, 12,481.60 and 3,390.20 is: 5,085.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,320.26 : 12,481.60 = 3,390.20 : x
  2. Step 2: Convert to fraction form
    8,320.26/12,481.60 = 3,390.20/x
  3. Step 3: Cross multiply
    8,320.26x = 12,481.60 × 3,390.20
  4. Step 4: Simplify right side
    8,320.26x = 42,315,120.32
  5. Step 5: Solve for x
    x = 42,315,120.32/8,320.26
  6. Step 6: Final answer
    x = 5,085.79

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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.