Home / 3,923.13-5,413.86-2,154.78

Finding the Fourth Proportional to 3,923.13, 5,413.86 and 2,154.78

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Solution

The fourth proportional to 3,923.13, 5,413.86 and 2,154.78 is: 2,973.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.13 : 5,413.86 = 2,154.78 : x
  2. Step 2: Convert to fraction form
    3,923.13/5,413.86 = 2,154.78/x
  3. Step 3: Cross multiply
    3,923.13x = 5,413.86 × 2,154.78
  4. Step 4: Simplify right side
    3,923.13x = 11,665,677.25
  5. Step 5: Solve for x
    x = 11,665,677.25/3,923.13
  6. Step 6: Final answer
    x = 2,973.56

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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.