Home / 19,917.56-29,876.38-8,231.09

Finding the Fourth Proportional to 19,917.56, 29,876.38 and 8,231.09

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Solution

The fourth proportional to 19,917.56, 29,876.38 and 8,231.09 is: 12,346.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.56 : 29,876.38 = 8,231.09 : x
  2. Step 2: Convert to fraction form
    19,917.56/29,876.38 = 8,231.09/x
  3. Step 3: Cross multiply
    19,917.56x = 29,876.38 × 8,231.09
  4. Step 4: Simplify right side
    19,917.56x = 245,915,002.69
  5. Step 5: Solve for x
    x = 245,915,002.69/19,917.56
  6. Step 6: Final answer
    x = 12,346.64

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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.