Home / 3,990.84-5,507.36-2,222.61

Finding the Fourth Proportional to 3,990.84, 5,507.36 and 2,222.61

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Solution

The fourth proportional to 3,990.84, 5,507.36 and 2,222.61 is: 3,067.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.84 : 5,507.36 = 2,222.61 : x
  2. Step 2: Convert to fraction form
    3,990.84/5,507.36 = 2,222.61/x
  3. Step 3: Cross multiply
    3,990.84x = 5,507.36 × 2,222.61
  4. Step 4: Simplify right side
    3,990.84x = 12,240,713.41
  5. Step 5: Solve for x
    x = 12,240,713.41/3,990.84
  6. Step 6: Final answer
    x = 3,067.20

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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.