Home / 3,990.16-5,506.41-2,221.73

Finding the Fourth Proportional to 3,990.16, 5,506.41 and 2,221.73

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Solution

The fourth proportional to 3,990.16, 5,506.41 and 2,221.73 is: 3,065.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.16 : 5,506.41 = 2,221.73 : x
  2. Step 2: Convert to fraction form
    3,990.16/5,506.41 = 2,221.73/x
  3. Step 3: Cross multiply
    3,990.16x = 5,506.41 × 2,221.73
  4. Step 4: Simplify right side
    3,990.16x = 12,233,756.29
  5. Step 5: Solve for x
    x = 12,233,756.29/3,990.16
  6. Step 6: Final answer
    x = 3,065.98

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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.