Home / 8,120.82-12,181.68-3,964.38

Finding the Fourth Proportional to 8,120.82, 12,181.68 and 3,964.38

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Solution

The fourth proportional to 8,120.82, 12,181.68 and 3,964.38 is: 5,946.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.82 : 12,181.68 = 3,964.38 : x
  2. Step 2: Convert to fraction form
    8,120.82/12,181.68 = 3,964.38/x
  3. Step 3: Cross multiply
    8,120.82x = 12,181.68 × 3,964.38
  4. Step 4: Simplify right side
    8,120.82x = 48,292,808.56
  5. Step 5: Solve for x
    x = 48,292,808.56/8,120.82
  6. Step 6: Final answer
    x = 5,946.79

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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.