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Finding the Fourth Proportional to 17,103.80, 25,659.30 and 5,418.20

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Solution

The fourth proportional to 17,103.80, 25,659.30 and 5,418.20 is: 8,128.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,103.80 : 25,659.30 = 5,418.20 : x
  2. Step 2: Convert to fraction form
    17,103.80/25,659.30 = 5,418.20/x
  3. Step 3: Cross multiply
    17,103.80x = 25,659.30 × 5,418.20
  4. Step 4: Simplify right side
    17,103.80x = 139,027,219.26
  5. Step 5: Solve for x
    x = 139,027,219.26/17,103.80
  6. Step 6: Final answer
    x = 8,128.44

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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.