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Finding the Fourth Proportional to 17,009.60, 25,516.80 and 5,321.60

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Solution

The fourth proportional to 17,009.60, 25,516.80 and 5,321.60 is: 7,983.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,009.60 : 25,516.80 = 5,321.60 : x
  2. Step 2: Convert to fraction form
    17,009.60/25,516.80 = 5,321.60/x
  3. Step 3: Cross multiply
    17,009.60x = 25,516.80 × 5,321.60
  4. Step 4: Simplify right side
    17,009.60x = 135,790,202.88
  5. Step 5: Solve for x
    x = 135,790,202.88/17,009.60
  6. Step 6: Final answer
    x = 7,983.15

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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.