Home / 11,109.78-16,662.24-6,419.88

Finding the Fourth Proportional to 11,109.78, 16,662.24 and 6,419.88

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Solution

The fourth proportional to 11,109.78, 16,662.24 and 6,419.88 is: 9,628.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,109.78 : 16,662.24 = 6,419.88 : x
  2. Step 2: Convert to fraction form
    11,109.78/16,662.24 = 6,419.88/x
  3. Step 3: Cross multiply
    11,109.78x = 16,662.24 × 6,419.88
  4. Step 4: Simplify right side
    11,109.78x = 106,969,581.33
  5. Step 5: Solve for x
    x = 106,969,581.33/11,109.78
  6. Step 6: Final answer
    x = 9,628.42

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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.