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Finding the Fourth Proportional to 17,131.90, 25,701.90 and 8,813.20

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Solution

The fourth proportional to 17,131.90, 25,701.90 and 8,813.20 is: 13,221.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,131.90 : 25,701.90 = 8,813.20 : x
  2. Step 2: Convert to fraction form
    17,131.90/25,701.90 = 8,813.20/x
  3. Step 3: Cross multiply
    17,131.90x = 25,701.90 × 8,813.20
  4. Step 4: Simplify right side
    17,131.90x = 226,515,985.08
  5. Step 5: Solve for x
    x = 226,515,985.08/17,131.90
  6. Step 6: Final answer
    x = 13,221.88

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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.