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Finding the Fourth Proportional to 8,413.66, 12,619.38 and 2,866.78

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Solution

The fourth proportional to 8,413.66, 12,619.38 and 2,866.78 is: 4,299.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,413.66 : 12,619.38 = 2,866.78 : x
  2. Step 2: Convert to fraction form
    8,413.66/12,619.38 = 2,866.78/x
  3. Step 3: Cross multiply
    8,413.66x = 12,619.38 × 2,866.78
  4. Step 4: Simplify right side
    8,413.66x = 36,176,986.20
  5. Step 5: Solve for x
    x = 36,176,986.20/8,413.66
  6. Step 6: Final answer
    x = 4,299.79

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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.