Home / 13,664.36-20,470.62-8,105.96

Finding the Fourth Proportional to 13,664.36, 20,470.62 and 8,105.96

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Solution

The fourth proportional to 13,664.36, 20,470.62 and 8,105.96 is: 12,143.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,664.36 : 20,470.62 = 8,105.96 : x
  2. Step 2: Convert to fraction form
    13,664.36/20,470.62 = 8,105.96/x
  3. Step 3: Cross multiply
    13,664.36x = 20,470.62 × 8,105.96
  4. Step 4: Simplify right side
    13,664.36x = 165,934,026.90
  5. Step 5: Solve for x
    x = 165,934,026.90/13,664.36
  6. Step 6: Final answer
    x = 12,143.56

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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.