Home / 2,112.31-3,169.17-1,331.41

Finding the Fourth Proportional to 2,112.31, 3,169.17 and 1,331.41

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Solution

The fourth proportional to 2,112.31, 3,169.17 and 1,331.41 is: 1,997.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.31 : 3,169.17 = 1,331.41 : x
  2. Step 2: Convert to fraction form
    2,112.31/3,169.17 = 1,331.41/x
  3. Step 3: Cross multiply
    2,112.31x = 3,169.17 × 1,331.41
  4. Step 4: Simplify right side
    2,112.31x = 4,219,464.63
  5. Step 5: Solve for x
    x = 4,219,464.63/2,112.31
  6. Step 6: Final answer
    x = 1,997.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.