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Finding the Fourth Proportional to 17,147.60, 25,721.40 and 15,419.60

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Solution

The fourth proportional to 17,147.60, 25,721.40 and 15,419.60 is: 23,129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,147.60 : 25,721.40 = 15,419.60 : x
  2. Step 2: Convert to fraction form
    17,147.60/25,721.40 = 15,419.60/x
  3. Step 3: Cross multiply
    17,147.60x = 25,721.40 × 15,419.60
  4. Step 4: Simplify right side
    17,147.60x = 396,613,699.44
  5. Step 5: Solve for x
    x = 396,613,699.44/17,147.60
  6. Step 6: Final answer
    x = 23,129.40

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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.