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Finding the Fourth Proportional to 11,600.99, 16,009.20 and 6,821.48

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Solution

The fourth proportional to 11,600.99, 16,009.20 and 6,821.48 is: 9,413.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,600.99 : 16,009.20 = 6,821.48 : x
  2. Step 2: Convert to fraction form
    11,600.99/16,009.20 = 6,821.48/x
  3. Step 3: Cross multiply
    11,600.99x = 16,009.20 × 6,821.48
  4. Step 4: Simplify right side
    11,600.99x = 109,206,357.57
  5. Step 5: Solve for x
    x = 109,206,357.57/11,600.99
  6. Step 6: Final answer
    x = 9,413.54

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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.