Home / 13,186.85-18,198.07-7,218.42

Finding the Fourth Proportional to 13,186.85, 18,198.07 and 7,218.42

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Solution

The fourth proportional to 13,186.85, 18,198.07 and 7,218.42 is: 9,961.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.85 : 18,198.07 = 7,218.42 : x
  2. Step 2: Convert to fraction form
    13,186.85/18,198.07 = 7,218.42/x
  3. Step 3: Cross multiply
    13,186.85x = 18,198.07 × 7,218.42
  4. Step 4: Simplify right side
    13,186.85x = 131,361,226.16
  5. Step 5: Solve for x
    x = 131,361,226.16/13,186.85
  6. Step 6: Final answer
    x = 9,961.53

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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.