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Finding the Fourth Proportional to 18,330, 27,502.79 and 12,413.56

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Solution

The fourth proportional to 18,330, 27,502.79 and 12,413.56 is: 18,625.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,330 : 27,502.79 = 12,413.56 : x
  2. Step 2: Convert to fraction form
    18,330/27,502.79 = 12,413.56/x
  3. Step 3: Cross multiply
    18,330x = 27,502.79 × 12,413.56
  4. Step 4: Simplify right side
    18,330x = 341,407,533.83
  5. Step 5: Solve for x
    x = 341,407,533.83/18,330
  6. Step 6: Final answer
    x = 18,625.62

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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.