Home / 5,211-7,191.21-2,972.85

Finding the Fourth Proportional to 5,211, 7,191.21 and 2,972.85

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Solution

The fourth proportional to 5,211, 7,191.21 and 2,972.85 is: 4,102.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211 : 7,191.21 = 2,972.85 : x
  2. Step 2: Convert to fraction form
    5,211/7,191.21 = 2,972.85/x
  3. Step 3: Cross multiply
    5,211x = 7,191.21 × 2,972.85
  4. Step 4: Simplify right side
    5,211x = 21,378,413.28
  5. Step 5: Solve for x
    x = 21,378,413.28/5,211
  6. Step 6: Final answer
    x = 4,102.55

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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.