Home / 3,181.28-4,393.50-2,189.12

Finding the Fourth Proportional to 3,181.28, 4,393.50 and 2,189.12

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Solution

The fourth proportional to 3,181.28, 4,393.50 and 2,189.12 is: 3,023.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.28 : 4,393.50 = 2,189.12 : x
  2. Step 2: Convert to fraction form
    3,181.28/4,393.50 = 2,189.12/x
  3. Step 3: Cross multiply
    3,181.28x = 4,393.50 × 2,189.12
  4. Step 4: Simplify right side
    3,181.28x = 9,617,898.72
  5. Step 5: Solve for x
    x = 9,617,898.72/3,181.28
  6. Step 6: Final answer
    x = 3,023.28

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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.