Home / 3,181.78-4,394.04-2,189.56

Finding the Fourth Proportional to 3,181.78, 4,394.04 and 2,189.56

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Solution

The fourth proportional to 3,181.78, 4,394.04 and 2,189.56 is: 3,023.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.78 : 4,394.04 = 2,189.56 : x
  2. Step 2: Convert to fraction form
    3,181.78/4,394.04 = 2,189.56/x
  3. Step 3: Cross multiply
    3,181.78x = 4,394.04 × 2,189.56
  4. Step 4: Simplify right side
    3,181.78x = 9,621,014.22
  5. Step 5: Solve for x
    x = 9,621,014.22/3,181.78
  6. Step 6: Final answer
    x = 3,023.78

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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.