Home / 3,922.66-5,413.29-2,154.31

Finding the Fourth Proportional to 3,922.66, 5,413.29 and 2,154.31

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Solution

The fourth proportional to 3,922.66, 5,413.29 and 2,154.31 is: 2,972.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.66 : 5,413.29 = 2,154.31 : x
  2. Step 2: Convert to fraction form
    3,922.66/5,413.29 = 2,154.31/x
  3. Step 3: Cross multiply
    3,922.66x = 5,413.29 × 2,154.31
  4. Step 4: Simplify right side
    3,922.66x = 11,661,904.78
  5. Step 5: Solve for x
    x = 11,661,904.78/3,922.66
  6. Step 6: Final answer
    x = 2,972.96

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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.