Home / 3,179.28-4,388.94-2,118.81

Finding the Fourth Proportional to 3,179.28, 4,388.94 and 2,118.81

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Solution

The fourth proportional to 3,179.28, 4,388.94 and 2,118.81 is: 2,924.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,179.28 : 4,388.94 = 2,118.81 : x
  2. Step 2: Convert to fraction form
    3,179.28/4,388.94 = 2,118.81/x
  3. Step 3: Cross multiply
    3,179.28x = 4,388.94 × 2,118.81
  4. Step 4: Simplify right side
    3,179.28x = 9,299,329.96
  5. Step 5: Solve for x
    x = 9,299,329.96/3,179.28
  6. Step 6: Final answer
    x = 2,924.98

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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.