Home / 12,215.80-16,857.78-7,183.24

Finding the Fourth Proportional to 12,215.80, 16,857.78 and 7,183.24

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Solution

The fourth proportional to 12,215.80, 16,857.78 and 7,183.24 is: 9,912.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,215.80 : 16,857.78 = 7,183.24 : x
  2. Step 2: Convert to fraction form
    12,215.80/16,857.78 = 7,183.24/x
  3. Step 3: Cross multiply
    12,215.80x = 16,857.78 × 7,183.24
  4. Step 4: Simplify right side
    12,215.80x = 121,093,479.61
  5. Step 5: Solve for x
    x = 121,093,479.61/12,215.80
  6. Step 6: Final answer
    x = 9,912.86

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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.