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Finding the Fourth Proportional to 18,481.80, 27,703.80 and 9,107.40

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Solution

The fourth proportional to 18,481.80, 27,703.80 and 9,107.40 is: 13,651.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.80 : 27,703.80 = 9,107.40 : x
  2. Step 2: Convert to fraction form
    18,481.80/27,703.80 = 9,107.40/x
  3. Step 3: Cross multiply
    18,481.80x = 27,703.80 × 9,107.40
  4. Step 4: Simplify right side
    18,481.80x = 252,309,588.12
  5. Step 5: Solve for x
    x = 252,309,588.12/18,481.80
  6. Step 6: Final answer
    x = 13,651.79

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1.5x scale

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.