Home / 8,081.25-12,121.88-2,609.25

Finding the Fourth Proportional to 8,081.25, 12,121.88 and 2,609.25

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Solution

The fourth proportional to 8,081.25, 12,121.88 and 2,609.25 is: 3,913.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.25 : 12,121.88 = 2,609.25 : x
  2. Step 2: Convert to fraction form
    8,081.25/12,121.88 = 2,609.25/x
  3. Step 3: Cross multiply
    8,081.25x = 12,121.88 × 2,609.25
  4. Step 4: Simplify right side
    8,081.25x = 31,629,002.34
  5. Step 5: Solve for x
    x = 31,629,002.34/8,081.25
  6. Step 6: Final answer
    x = 3,913.88

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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.