Home / 3,990.21-5,506.63-2,197.88

Finding the Fourth Proportional to 3,990.21, 5,506.63 and 2,197.88

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Solution

The fourth proportional to 3,990.21, 5,506.63 and 2,197.88 is: 3,033.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.21 : 5,506.63 = 2,197.88 : x
  2. Step 2: Convert to fraction form
    3,990.21/5,506.63 = 2,197.88/x
  3. Step 3: Cross multiply
    3,990.21x = 5,506.63 × 2,197.88
  4. Step 4: Simplify right side
    3,990.21x = 12,102,942.90
  5. Step 5: Solve for x
    x = 12,102,942.90/3,990.21
  6. Step 6: Final answer
    x = 3,033.16

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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.