Home / 7,139.20-10,709.82-2,209.22

Finding the Fourth Proportional to 7,139.20, 10,709.82 and 2,209.22

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Solution

The fourth proportional to 7,139.20, 10,709.82 and 2,209.22 is: 3,314.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,139.20 : 10,709.82 = 2,209.22 : x
  2. Step 2: Convert to fraction form
    7,139.20/10,709.82 = 2,209.22/x
  3. Step 3: Cross multiply
    7,139.20x = 10,709.82 × 2,209.22
  4. Step 4: Simplify right side
    7,139.20x = 23,660,375.31
  5. Step 5: Solve for x
    x = 23,660,375.31/7,139.20
  6. Step 6: Final answer
    x = 3,314.15

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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.