Home / 3,121.94-4,309.00-2,179.71

Finding the Fourth Proportional to 3,121.94, 4,309.00 and 2,179.71

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Solution

The fourth proportional to 3,121.94, 4,309.00 and 2,179.71 is: 3,008.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.94 : 4,309.00 = 2,179.71 : x
  2. Step 2: Convert to fraction form
    3,121.94/4,309.00 = 2,179.71/x
  3. Step 3: Cross multiply
    3,121.94x = 4,309.00 × 2,179.71
  4. Step 4: Simplify right side
    3,121.94x = 9,392,364.94
  5. Step 5: Solve for x
    x = 9,392,364.94/3,121.94
  6. Step 6: Final answer
    x = 3,008.50

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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.