Home / 12,115.33-18,143.83-8,207.89

Finding the Fourth Proportional to 12,115.33, 18,143.83 and 8,207.89

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Solution

The fourth proportional to 12,115.33, 18,143.83 and 8,207.89 is: 12,292.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,115.33 : 18,143.83 = 8,207.89 : x
  2. Step 2: Convert to fraction form
    12,115.33/18,143.83 = 8,207.89/x
  3. Step 3: Cross multiply
    12,115.33x = 18,143.83 × 8,207.89
  4. Step 4: Simplify right side
    12,115.33x = 148,922,449.58
  5. Step 5: Solve for x
    x = 148,922,449.58/12,115.33
  6. Step 6: Final answer
    x = 12,292.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.