Home / 6,822.38-9,413.47-3,989.21

Finding the Fourth Proportional to 6,822.38, 9,413.47 and 3,989.21

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Solution

The fourth proportional to 6,822.38, 9,413.47 and 3,989.21 is: 5,504.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,822.38 : 9,413.47 = 3,989.21 : x
  2. Step 2: Convert to fraction form
    6,822.38/9,413.47 = 3,989.21/x
  3. Step 3: Cross multiply
    6,822.38x = 9,413.47 × 3,989.21
  4. Step 4: Simplify right side
    6,822.38x = 37,552,251.62
  5. Step 5: Solve for x
    x = 37,552,251.62/6,822.38
  6. Step 6: Final answer
    x = 5,504.27

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Half scale
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Double scale
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Similar ratio
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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.