Home / 3,922.85-5,413.55-2,154.47

Finding the Fourth Proportional to 3,922.85, 5,413.55 and 2,154.47

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Solution

The fourth proportional to 3,922.85, 5,413.55 and 2,154.47 is: 2,973.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.85 : 5,413.55 = 2,154.47 : x
  2. Step 2: Convert to fraction form
    3,922.85/5,413.55 = 2,154.47/x
  3. Step 3: Cross multiply
    3,922.85x = 5,413.55 × 2,154.47
  4. Step 4: Simplify right side
    3,922.85x = 11,663,293.23
  5. Step 5: Solve for x
    x = 11,663,293.23/3,922.85
  6. Step 6: Final answer
    x = 2,973.17

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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.