Home / 3,990.52-5,506.68-2,222.20

Finding the Fourth Proportional to 3,990.52, 5,506.68 and 2,222.20

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Solution

The fourth proportional to 3,990.52, 5,506.68 and 2,222.20 is: 3,066.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.52 : 5,506.68 = 2,222.20 : x
  2. Step 2: Convert to fraction form
    3,990.52/5,506.68 = 2,222.20/x
  3. Step 3: Cross multiply
    3,990.52x = 5,506.68 × 2,222.20
  4. Step 4: Simplify right side
    3,990.52x = 12,236,944.30
  5. Step 5: Solve for x
    x = 12,236,944.30/3,990.52
  6. Step 6: Final answer
    x = 3,066.50

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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.