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Finding the Fourth Proportional to 11,720.25, 17,568 and 4,319.97

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Solution

The fourth proportional to 11,720.25, 17,568 and 4,319.97 is: 6,475.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720.25 : 17,568 = 4,319.97 : x
  2. Step 2: Convert to fraction form
    11,720.25/17,568 = 4,319.97/x
  3. Step 3: Cross multiply
    11,720.25x = 17,568 × 4,319.97
  4. Step 4: Simplify right side
    11,720.25x = 75,893,232.96
  5. Step 5: Solve for x
    x = 75,893,232.96/11,720.25
  6. Step 6: Final answer
    x = 6,475.39

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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.