Home / 7,878.97-11,819.09-2,613.79

Finding the Fourth Proportional to 7,878.97, 11,819.09 and 2,613.79

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Solution

The fourth proportional to 7,878.97, 11,819.09 and 2,613.79 is: 3,920.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,878.97 : 11,819.09 = 2,613.79 : x
  2. Step 2: Convert to fraction form
    7,878.97/11,819.09 = 2,613.79/x
  3. Step 3: Cross multiply
    7,878.97x = 11,819.09 × 2,613.79
  4. Step 4: Simplify right side
    7,878.97x = 30,892,619.25
  5. Step 5: Solve for x
    x = 30,892,619.25/7,878.97
  6. Step 6: Final answer
    x = 3,920.90

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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.