Home / 12,940.15-19,390.99-6,691.82

Finding the Fourth Proportional to 12,940.15, 19,390.99 and 6,691.82

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Solution

The fourth proportional to 12,940.15, 19,390.99 and 6,691.82 is: 10,027.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,940.15 : 19,390.99 = 6,691.82 : x
  2. Step 2: Convert to fraction form
    12,940.15/19,390.99 = 6,691.82/x
  3. Step 3: Cross multiply
    12,940.15x = 19,390.99 × 6,691.82
  4. Step 4: Simplify right side
    12,940.15x = 129,761,014.70
  5. Step 5: Solve for x
    x = 129,761,014.70/12,940.15
  6. Step 6: Final answer
    x = 10,027.78

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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.