Home / 3,990.84-5,508.63-2,731.43

Finding the Fourth Proportional to 3,990.84, 5,508.63 and 2,731.43

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Solution

The fourth proportional to 3,990.84, 5,508.63 and 2,731.43 is: 3,770.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.84 : 5,508.63 = 2,731.43 : x
  2. Step 2: Convert to fraction form
    3,990.84/5,508.63 = 2,731.43/x
  3. Step 3: Cross multiply
    3,990.84x = 5,508.63 × 2,731.43
  4. Step 4: Simplify right side
    3,990.84x = 15,046,409.70
  5. Step 5: Solve for x
    x = 15,046,409.70/3,990.84
  6. Step 6: Final answer
    x = 3,770.24

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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.