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Finding the Fourth Proportional to 11,391.44, 15,719.82 and 6,217.12

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Solution

The fourth proportional to 11,391.44, 15,719.82 and 6,217.12 is: 8,579.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.44 : 15,719.82 = 6,217.12 : x
  2. Step 2: Convert to fraction form
    11,391.44/15,719.82 = 6,217.12/x
  3. Step 3: Cross multiply
    11,391.44x = 15,719.82 × 6,217.12
  4. Step 4: Simplify right side
    11,391.44x = 97,731,972.31
  5. Step 5: Solve for x
    x = 97,731,972.31/11,391.44
  6. Step 6: Final answer
    x = 8,579.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.