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Finding the Fourth Proportional to 11,812.68, 17,719.11 and 6,879.15

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Solution

The fourth proportional to 11,812.68, 17,719.11 and 6,879.15 is: 10,318.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,812.68 : 17,719.11 = 6,879.15 : x
  2. Step 2: Convert to fraction form
    11,812.68/17,719.11 = 6,879.15/x
  3. Step 3: Cross multiply
    11,812.68x = 17,719.11 × 6,879.15
  4. Step 4: Simplify right side
    11,812.68x = 121,892,415.56
  5. Step 5: Solve for x
    x = 121,892,415.56/11,812.68
  6. Step 6: Final answer
    x = 10,318.78

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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.