Home / 7,121.05-10,686.16-3,836.43

Finding the Fourth Proportional to 7,121.05, 10,686.16 and 3,836.43

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Solution

The fourth proportional to 7,121.05, 10,686.16 and 3,836.43 is: 5,757.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,121.05 : 10,686.16 = 3,836.43 : x
  2. Step 2: Convert to fraction form
    7,121.05/10,686.16 = 3,836.43/x
  3. Step 3: Cross multiply
    7,121.05x = 10,686.16 × 3,836.43
  4. Step 4: Simplify right side
    7,121.05x = 40,996,709.60
  5. Step 5: Solve for x
    x = 40,996,709.60/7,121.05
  6. Step 6: Final answer
    x = 5,757.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.