Home / 13,189.62-18,201.73-7,221.39

Finding the Fourth Proportional to 13,189.62, 18,201.73 and 7,221.39

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Solution

The fourth proportional to 13,189.62, 18,201.73 and 7,221.39 is: 9,965.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,189.62 : 18,201.73 = 7,221.39 : x
  2. Step 2: Convert to fraction form
    13,189.62/18,201.73 = 7,221.39/x
  3. Step 3: Cross multiply
    13,189.62x = 18,201.73 × 7,221.39
  4. Step 4: Simplify right side
    13,189.62x = 131,441,791.00
  5. Step 5: Solve for x
    x = 131,441,791.00/13,189.62
  6. Step 6: Final answer
    x = 9,965.55

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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.