Home / 13,198.08-18,212.82-7,889.76

Finding the Fourth Proportional to 13,198.08, 18,212.82 and 7,889.76

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Solution

The fourth proportional to 13,198.08, 18,212.82 and 7,889.76 is: 10,887.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,198.08 : 18,212.82 = 7,889.76 : x
  2. Step 2: Convert to fraction form
    13,198.08/18,212.82 = 7,889.76/x
  3. Step 3: Cross multiply
    13,198.08x = 18,212.82 × 7,889.76
  4. Step 4: Simplify right side
    13,198.08x = 143,694,778.72
  5. Step 5: Solve for x
    x = 143,694,778.72/13,198.08
  6. Step 6: Final answer
    x = 10,887.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.