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Finding the Fourth Proportional to 19,481.80, 29,265.90 and 18,694.60

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Solution

The fourth proportional to 19,481.80, 29,265.90 and 18,694.60 is: 28,083.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,481.80 : 29,265.90 = 18,694.60 : x
  2. Step 2: Convert to fraction form
    19,481.80/29,265.90 = 18,694.60/x
  3. Step 3: Cross multiply
    19,481.80x = 29,265.90 × 18,694.60
  4. Step 4: Simplify right side
    19,481.80x = 547,114,294.14
  5. Step 5: Solve for x
    x = 547,114,294.14/19,481.80
  6. Step 6: Final answer
    x = 28,083.35

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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.