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Finding the Fourth Proportional to 18,781.92, 25,917.25 and 11,226.75

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Solution

The fourth proportional to 18,781.92, 25,917.25 and 11,226.75 is: 15,491.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.92 : 25,917.25 = 11,226.75 : x
  2. Step 2: Convert to fraction form
    18,781.92/25,917.25 = 11,226.75/x
  3. Step 3: Cross multiply
    18,781.92x = 25,917.25 × 11,226.75
  4. Step 4: Simplify right side
    18,781.92x = 290,966,300.72
  5. Step 5: Solve for x
    x = 290,966,300.72/18,781.92
  6. Step 6: Final answer
    x = 15,491.83

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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.