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Finding the Fourth Proportional to 11,168.60, 15,413.89 and 6,388.98

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Solution

The fourth proportional to 11,168.60, 15,413.89 and 6,388.98 is: 8,817.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,168.60 : 15,413.89 = 6,388.98 : x
  2. Step 2: Convert to fraction form
    11,168.60/15,413.89 = 6,388.98/x
  3. Step 3: Cross multiply
    11,168.60x = 15,413.89 × 6,388.98
  4. Step 4: Simplify right side
    11,168.60x = 98,479,034.93
  5. Step 5: Solve for x
    x = 98,479,034.93/11,168.60
  6. Step 6: Final answer
    x = 8,817.50

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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.