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Finding the Fourth Proportional to 18,687.91, 25,789.52 and 10,189.97

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Solution

The fourth proportional to 18,687.91, 25,789.52 and 10,189.97 is: 14,062.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.91 : 25,789.52 = 10,189.97 : x
  2. Step 2: Convert to fraction form
    18,687.91/25,789.52 = 10,189.97/x
  3. Step 3: Cross multiply
    18,687.91x = 25,789.52 × 10,189.97
  4. Step 4: Simplify right side
    18,687.91x = 262,794,435.11
  5. Step 5: Solve for x
    x = 262,794,435.11/18,687.91
  6. Step 6: Final answer
    x = 14,062.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.