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Finding the Fourth Proportional to 17,100.78, 25,653.60 and 5,412.78

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Solution

The fourth proportional to 17,100.78, 25,653.60 and 5,412.78 is: 8,119.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,100.78 : 25,653.60 = 5,412.78 : x
  2. Step 2: Convert to fraction form
    17,100.78/25,653.60 = 5,412.78/x
  3. Step 3: Cross multiply
    17,100.78x = 25,653.60 × 5,412.78
  4. Step 4: Simplify right side
    17,100.78x = 138,857,293.01
  5. Step 5: Solve for x
    x = 138,857,293.01/17,100.78
  6. Step 6: Final answer
    x = 8,119.94

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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.