Home / 5,108.21-7,656.87-2,912.21

Finding the Fourth Proportional to 5,108.21, 7,656.87 and 2,912.21

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Solution

The fourth proportional to 5,108.21, 7,656.87 and 2,912.21 is: 4,365.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,108.21 : 7,656.87 = 2,912.21 : x
  2. Step 2: Convert to fraction form
    5,108.21/7,656.87 = 2,912.21/x
  3. Step 3: Cross multiply
    5,108.21x = 7,656.87 × 2,912.21
  4. Step 4: Simplify right side
    5,108.21x = 22,298,413.38
  5. Step 5: Solve for x
    x = 22,298,413.38/5,108.21
  6. Step 6: Final answer
    x = 4,365.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.