Home / 6,819.60-10,229.70-2,139.66

Finding the Fourth Proportional to 6,819.60, 10,229.70 and 2,139.66

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Solution

The fourth proportional to 6,819.60, 10,229.70 and 2,139.66 is: 3,209.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,819.60 : 10,229.70 = 2,139.66 : x
  2. Step 2: Convert to fraction form
    6,819.60/10,229.70 = 2,139.66/x
  3. Step 3: Cross multiply
    6,819.60x = 10,229.70 × 2,139.66
  4. Step 4: Simplify right side
    6,819.60x = 21,888,079.90
  5. Step 5: Solve for x
    x = 21,888,079.90/6,819.60
  6. Step 6: Final answer
    x = 3,209.58

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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.