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Finding the Fourth Proportional to 7,879.73, 11,820.99 and 2,615.05

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Solution

The fourth proportional to 7,879.73, 11,820.99 and 2,615.05 is: 3,923.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.73 : 11,820.99 = 2,615.05 : x
  2. Step 2: Convert to fraction form
    7,879.73/11,820.99 = 2,615.05/x
  3. Step 3: Cross multiply
    7,879.73x = 11,820.99 × 2,615.05
  4. Step 4: Simplify right side
    7,879.73x = 30,912,466.82
  5. Step 5: Solve for x
    x = 30,912,466.82/7,879.73
  6. Step 6: Final answer
    x = 3,923.04

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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.