Home / 3,178.82-4,388.28-2,118.35

Finding the Fourth Proportional to 3,178.82, 4,388.28 and 2,118.35

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Solution

The fourth proportional to 3,178.82, 4,388.28 and 2,118.35 is: 2,924.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.82 : 4,388.28 = 2,118.35 : x
  2. Step 2: Convert to fraction form
    3,178.82/4,388.28 = 2,118.35/x
  3. Step 3: Cross multiply
    3,178.82x = 4,388.28 × 2,118.35
  4. Step 4: Simplify right side
    3,178.82x = 9,295,923.91
  5. Step 5: Solve for x
    x = 9,295,923.91/3,178.82
  6. Step 6: Final answer
    x = 2,924.33

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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.