Home / 5,638.94-7,781.68-3,121.23

Finding the Fourth Proportional to 5,638.94, 7,781.68 and 3,121.23

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Solution

The fourth proportional to 5,638.94, 7,781.68 and 3,121.23 is: 4,307.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.94 : 7,781.68 = 3,121.23 : x
  2. Step 2: Convert to fraction form
    5,638.94/7,781.68 = 3,121.23/x
  3. Step 3: Cross multiply
    5,638.94x = 7,781.68 × 3,121.23
  4. Step 4: Simplify right side
    5,638.94x = 24,288,413.07
  5. Step 5: Solve for x
    x = 24,288,413.07/5,638.94
  6. Step 6: Final answer
    x = 4,307.27

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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.