Home / 3,761.31-5,191.64-2,189.70

Finding the Fourth Proportional to 3,761.31, 5,191.64 and 2,189.70

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Solution

The fourth proportional to 3,761.31, 5,191.64 and 2,189.70 is: 3,022.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.31 : 5,191.64 = 2,189.70 : x
  2. Step 2: Convert to fraction form
    3,761.31/5,191.64 = 2,189.70/x
  3. Step 3: Cross multiply
    3,761.31x = 5,191.64 × 2,189.70
  4. Step 4: Simplify right side
    3,761.31x = 11,368,134.11
  5. Step 5: Solve for x
    x = 11,368,134.11/3,761.31
  6. Step 6: Final answer
    x = 3,022.39

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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.