Home / 13,190.62-18,203.11-7,222.39

Finding the Fourth Proportional to 13,190.62, 18,203.11 and 7,222.39

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Solution

The fourth proportional to 13,190.62, 18,203.11 and 7,222.39 is: 9,966.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.62 : 18,203.11 = 7,222.39 : x
  2. Step 2: Convert to fraction form
    13,190.62/18,203.11 = 7,222.39/x
  3. Step 3: Cross multiply
    13,190.62x = 18,203.11 × 7,222.39
  4. Step 4: Simplify right side
    13,190.62x = 131,469,959.63
  5. Step 5: Solve for x
    x = 131,469,959.63/13,190.62
  6. Step 6: Final answer
    x = 9,966.93

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Double scale
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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.