Home / 3,899.85-5,382.86-2,222.13

Finding the Fourth Proportional to 3,899.85, 5,382.86 and 2,222.13

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Solution

The fourth proportional to 3,899.85, 5,382.86 and 2,222.13 is: 3,067.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.85 : 5,382.86 = 2,222.13 : x
  2. Step 2: Convert to fraction form
    3,899.85/5,382.86 = 2,222.13/x
  3. Step 3: Cross multiply
    3,899.85x = 5,382.86 × 2,222.13
  4. Step 4: Simplify right side
    3,899.85x = 11,961,423.77
  5. Step 5: Solve for x
    x = 11,961,423.77/3,899.85
  6. Step 6: Final answer
    x = 3,067.15

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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.