Home / 3,761.32-5,190.92-2,189.72

Finding the Fourth Proportional to 3,761.32, 5,190.92 and 2,189.72

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Solution

The fourth proportional to 3,761.32, 5,190.92 and 2,189.72 is: 3,021.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,761.32 : 5,190.92 = 2,189.72 : x
  2. Step 2: Convert to fraction form
    3,761.32/5,190.92 = 2,189.72/x
  3. Step 3: Cross multiply
    3,761.32x = 5,190.92 × 2,189.72
  4. Step 4: Simplify right side
    3,761.32x = 11,366,661.34
  5. Step 5: Solve for x
    x = 11,366,661.34/3,761.32
  6. Step 6: Final answer
    x = 3,021.99

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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.