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Finding the Fourth Proportional to 8,999.45, 12,413.89 and 7,006.85

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Solution

The fourth proportional to 8,999.45, 12,413.89 and 7,006.85 is: 9,665.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.45 : 12,413.89 = 7,006.85 : x
  2. Step 2: Convert to fraction form
    8,999.45/12,413.89 = 7,006.85/x
  3. Step 3: Cross multiply
    8,999.45x = 12,413.89 × 7,006.85
  4. Step 4: Simplify right side
    8,999.45x = 86,982,265.15
  5. Step 5: Solve for x
    x = 86,982,265.15/8,999.45
  6. Step 6: Final answer
    x = 9,665.29

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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.