Home / 3,922.81-5,413.36-2,154.37

Finding the Fourth Proportional to 3,922.81, 5,413.36 and 2,154.37

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Solution

The fourth proportional to 3,922.81, 5,413.36 and 2,154.37 is: 2,972.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.81 : 5,413.36 = 2,154.37 : x
  2. Step 2: Convert to fraction form
    3,922.81/5,413.36 = 2,154.37/x
  3. Step 3: Cross multiply
    3,922.81x = 5,413.36 × 2,154.37
  4. Step 4: Simplify right side
    3,922.81x = 11,662,380.38
  5. Step 5: Solve for x
    x = 11,662,380.38/3,922.81
  6. Step 6: Final answer
    x = 2,972.97

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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.