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Finding the Fourth Proportional to 7,859.91, 11,789.70 and 2,313.12

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Solution

The fourth proportional to 7,859.91, 11,789.70 and 2,313.12 is: 3,469.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,859.91 : 11,789.70 = 2,313.12 : x
  2. Step 2: Convert to fraction form
    7,859.91/11,789.70 = 2,313.12/x
  3. Step 3: Cross multiply
    7,859.91x = 11,789.70 × 2,313.12
  4. Step 4: Simplify right side
    7,859.91x = 27,270,990.86
  5. Step 5: Solve for x
    x = 27,270,990.86/7,859.91
  6. Step 6: Final answer
    x = 3,469.63

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Similar ratio
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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.