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Finding the Fourth Proportional to 18,545.56, 27,811.78 and 8,015.15

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Solution

The fourth proportional to 18,545.56, 27,811.78 and 8,015.15 is: 12,019.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,545.56 : 27,811.78 = 8,015.15 : x
  2. Step 2: Convert to fraction form
    18,545.56/27,811.78 = 8,015.15/x
  3. Step 3: Cross multiply
    18,545.56x = 27,811.78 × 8,015.15
  4. Step 4: Simplify right side
    18,545.56x = 222,915,588.47
  5. Step 5: Solve for x
    x = 222,915,588.47/18,545.56
  6. Step 6: Final answer
    x = 12,019.89

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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.