Home / 3,990.57-5,506.99-2,222.13

Finding the Fourth Proportional to 3,990.57, 5,506.99 and 2,222.13

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Solution

The fourth proportional to 3,990.57, 5,506.99 and 2,222.13 is: 3,066.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.57 : 5,506.99 = 2,222.13 : x
  2. Step 2: Convert to fraction form
    3,990.57/5,506.99 = 2,222.13/x
  3. Step 3: Cross multiply
    3,990.57x = 5,506.99 × 2,222.13
  4. Step 4: Simplify right side
    3,990.57x = 12,237,262.78
  5. Step 5: Solve for x
    x = 12,237,262.78/3,990.57
  6. Step 6: Final answer
    x = 3,066.55

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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.