Home / 3,922.89-5,413.62-2,154.57

Finding the Fourth Proportional to 3,922.89, 5,413.62 and 2,154.57

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Solution

The fourth proportional to 3,922.89, 5,413.62 and 2,154.57 is: 2,973.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.89 : 5,413.62 = 2,154.57 : x
  2. Step 2: Convert to fraction form
    3,922.89/5,413.62 = 2,154.57/x
  3. Step 3: Cross multiply
    3,922.89x = 5,413.62 × 2,154.57
  4. Step 4: Simplify right side
    3,922.89x = 11,664,023.24
  5. Step 5: Solve for x
    x = 11,664,023.24/3,922.89
  6. Step 6: Final answer
    x = 2,973.32

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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.