Home / 12,669.21-17,479.23-8,198.61

Finding the Fourth Proportional to 12,669.21, 17,479.23 and 8,198.61

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Solution

The fourth proportional to 12,669.21, 17,479.23 and 8,198.61 is: 11,311.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,669.21 : 17,479.23 = 8,198.61 : x
  2. Step 2: Convert to fraction form
    12,669.21/17,479.23 = 8,198.61/x
  3. Step 3: Cross multiply
    12,669.21x = 17,479.23 × 8,198.61
  4. Step 4: Simplify right side
    12,669.21x = 143,305,389.87
  5. Step 5: Solve for x
    x = 143,305,389.87/12,669.21
  6. Step 6: Final answer
    x = 11,311.31

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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.