Home / 8,403.20-12,609.60-3,212.80

Finding the Fourth Proportional to 8,403.20, 12,609.60 and 3,212.80

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Solution

The fourth proportional to 8,403.20, 12,609.60 and 3,212.80 is: 4,821.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,403.20 : 12,609.60 = 3,212.80 : x
  2. Step 2: Convert to fraction form
    8,403.20/12,609.60 = 3,212.80/x
  3. Step 3: Cross multiply
    8,403.20x = 12,609.60 × 3,212.80
  4. Step 4: Simplify right side
    8,403.20x = 40,512,122.88
  5. Step 5: Solve for x
    x = 40,512,122.88/8,403.20
  6. Step 6: Final answer
    x = 4,821.04

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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.