Home / 8,399.20-12,603.60-3,208.80

Finding the Fourth Proportional to 8,399.20, 12,603.60 and 3,208.80

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Solution

The fourth proportional to 8,399.20, 12,603.60 and 3,208.80 is: 4,815.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,399.20 : 12,603.60 = 3,208.80 : x
  2. Step 2: Convert to fraction form
    8,399.20/12,603.60 = 3,208.80/x
  3. Step 3: Cross multiply
    8,399.20x = 12,603.60 × 3,208.80
  4. Step 4: Simplify right side
    8,399.20x = 40,442,431.68
  5. Step 5: Solve for x
    x = 40,442,431.68/8,399.20
  6. Step 6: Final answer
    x = 4,815.03

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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.