Home / 13,186.97-18,197.87-7,218.65

Finding the Fourth Proportional to 13,186.97, 18,197.87 and 7,218.65

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Solution

The fourth proportional to 13,186.97, 18,197.87 and 7,218.65 is: 9,961.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,186.97 : 18,197.87 = 7,218.65 : x
  2. Step 2: Convert to fraction form
    13,186.97/18,197.87 = 7,218.65/x
  3. Step 3: Cross multiply
    13,186.97x = 18,197.87 × 7,218.65
  4. Step 4: Simplify right side
    13,186.97x = 131,363,981.33
  5. Step 5: Solve for x
    x = 131,363,981.33/13,186.97
  6. Step 6: Final answer
    x = 9,961.65

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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.