Home / 2,843.56-3,921.78-2,181.99

Finding the Fourth Proportional to 2,843.56, 3,921.78 and 2,181.99

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Solution

The fourth proportional to 2,843.56, 3,921.78 and 2,181.99 is: 3,009.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,843.56 : 3,921.78 = 2,181.99 : x
  2. Step 2: Convert to fraction form
    2,843.56/3,921.78 = 2,181.99/x
  3. Step 3: Cross multiply
    2,843.56x = 3,921.78 × 2,181.99
  4. Step 4: Simplify right side
    2,843.56x = 8,557,284.74
  5. Step 5: Solve for x
    x = 8,557,284.74/2,843.56
  6. Step 6: Final answer
    x = 3,009.36

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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.