Home / 8,078.40-12,103.20-6,609.60

Finding the Fourth Proportional to 8,078.40, 12,103.20 and 6,609.60

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Solution

The fourth proportional to 8,078.40, 12,103.20 and 6,609.60 is: 9,902.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,078.40 : 12,103.20 = 6,609.60 : x
  2. Step 2: Convert to fraction form
    8,078.40/12,103.20 = 6,609.60/x
  3. Step 3: Cross multiply
    8,078.40x = 12,103.20 × 6,609.60
  4. Step 4: Simplify right side
    8,078.40x = 79,997,310.72
  5. Step 5: Solve for x
    x = 79,997,310.72/8,078.40
  6. Step 6: Final answer
    x = 9,902.62

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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.