Home / 3,990.66-5,508.33-2,731.21

Finding the Fourth Proportional to 3,990.66, 5,508.33 and 2,731.21

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Solution

The fourth proportional to 3,990.66, 5,508.33 and 2,731.21 is: 3,769.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.66 : 5,508.33 = 2,731.21 : x
  2. Step 2: Convert to fraction form
    3,990.66/5,508.33 = 2,731.21/x
  3. Step 3: Cross multiply
    3,990.66x = 5,508.33 × 2,731.21
  4. Step 4: Simplify right side
    3,990.66x = 15,044,405.98
  5. Step 5: Solve for x
    x = 15,044,405.98/3,990.66
  6. Step 6: Final answer
    x = 3,769.90

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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.