Home / 8,120.92-12,181.38-2,859.81

Finding the Fourth Proportional to 8,120.92, 12,181.38 and 2,859.81

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Solution

The fourth proportional to 8,120.92, 12,181.38 and 2,859.81 is: 4,289.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,120.92 : 12,181.38 = 2,859.81 : x
  2. Step 2: Convert to fraction form
    8,120.92/12,181.38 = 2,859.81/x
  3. Step 3: Cross multiply
    8,120.92x = 12,181.38 × 2,859.81
  4. Step 4: Simplify right side
    8,120.92x = 34,836,418.04
  5. Step 5: Solve for x
    x = 34,836,418.04/8,120.92
  6. Step 6: Final answer
    x = 4,289.72

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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.