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Finding the Fourth Proportional to 18,121.92, 25,016.07 and 16,987.09

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Solution

The fourth proportional to 18,121.92, 25,016.07 and 16,987.09 is: 23,449.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,121.92 : 25,016.07 = 16,987.09 : x
  2. Step 2: Convert to fraction form
    18,121.92/25,016.07 = 16,987.09/x
  3. Step 3: Cross multiply
    18,121.92x = 25,016.07 × 16,987.09
  4. Step 4: Simplify right side
    18,121.92x = 424,950,107.46
  5. Step 5: Solve for x
    x = 424,950,107.46/18,121.92
  6. Step 6: Final answer
    x = 23,449.51

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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.