Home / 8,226.80-12,340.20-7,319.60

Finding the Fourth Proportional to 8,226.80, 12,340.20 and 7,319.60

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Solution

The fourth proportional to 8,226.80, 12,340.20 and 7,319.60 is: 10,979.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,226.80 : 12,340.20 = 7,319.60 : x
  2. Step 2: Convert to fraction form
    8,226.80/12,340.20 = 7,319.60/x
  3. Step 3: Cross multiply
    8,226.80x = 12,340.20 × 7,319.60
  4. Step 4: Simplify right side
    8,226.80x = 90,325,327.92
  5. Step 5: Solve for x
    x = 90,325,327.92/8,226.80
  6. Step 6: Final answer
    x = 10,979.40

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Similar ratio
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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.