Home / 3,121.92-4,309.83-2,412.17

Finding the Fourth Proportional to 3,121.92, 4,309.83 and 2,412.17

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Solution

The fourth proportional to 3,121.92, 4,309.83 and 2,412.17 is: 3,330.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.92 : 4,309.83 = 2,412.17 : x
  2. Step 2: Convert to fraction form
    3,121.92/4,309.83 = 2,412.17/x
  3. Step 3: Cross multiply
    3,121.92x = 4,309.83 × 2,412.17
  4. Step 4: Simplify right side
    3,121.92x = 10,396,021.08
  5. Step 5: Solve for x
    x = 10,396,021.08/3,121.92
  6. Step 6: Final answer
    x = 3,330.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.