Home / 13,197.89-18,212.60-7,229.61

Finding the Fourth Proportional to 13,197.89, 18,212.60 and 7,229.61

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Solution

The fourth proportional to 13,197.89, 18,212.60 and 7,229.61 is: 9,976.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,197.89 : 18,212.60 = 7,229.61 : x
  2. Step 2: Convert to fraction form
    13,197.89/18,212.60 = 7,229.61/x
  3. Step 3: Cross multiply
    13,197.89x = 18,212.60 × 7,229.61
  4. Step 4: Simplify right side
    13,197.89x = 131,669,958.94
  5. Step 5: Solve for x
    x = 131,669,958.94/13,197.89
  6. Step 6: Final answer
    x = 9,976.60

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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.