Home / 12,579.39-17,440.22-11,879.55

Finding the Fourth Proportional to 12,579.39, 17,440.22 and 11,879.55

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Solution

The fourth proportional to 12,579.39, 17,440.22 and 11,879.55 is: 16,469.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,579.39 : 17,440.22 = 11,879.55 : x
  2. Step 2: Convert to fraction form
    12,579.39/17,440.22 = 11,879.55/x
  3. Step 3: Cross multiply
    12,579.39x = 17,440.22 × 11,879.55
  4. Step 4: Simplify right side
    12,579.39x = 207,181,995.20
  5. Step 5: Solve for x
    x = 207,181,995.20/12,579.39
  6. Step 6: Final answer
    x = 16,469.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.