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Finding the Fourth Proportional to 8,119, 12,179.10 and 2,275.39

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Solution

The fourth proportional to 8,119, 12,179.10 and 2,275.39 is: 3,413.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119 : 12,179.10 = 2,275.39 : x
  2. Step 2: Convert to fraction form
    8,119/12,179.10 = 2,275.39/x
  3. Step 3: Cross multiply
    8,119x = 12,179.10 × 2,275.39
  4. Step 4: Simplify right side
    8,119x = 27,712,202.35
  5. Step 5: Solve for x
    x = 27,712,202.35/8,119
  6. Step 6: Final answer
    x = 3,413.25

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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.