Home / 13,190.09-18,202.25-7,221.65

Finding the Fourth Proportional to 13,190.09, 18,202.25 and 7,221.65

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Solution

The fourth proportional to 13,190.09, 18,202.25 and 7,221.65 is: 9,965.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,190.09 : 18,202.25 = 7,221.65 : x
  2. Step 2: Convert to fraction form
    13,190.09/18,202.25 = 7,221.65/x
  3. Step 3: Cross multiply
    13,190.09x = 18,202.25 × 7,221.65
  4. Step 4: Simplify right side
    13,190.09x = 131,450,205.76
  5. Step 5: Solve for x
    x = 131,450,205.76/13,190.09
  6. Step 6: Final answer
    x = 9,965.83

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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.