Home / 13,413.28-20,121.84-4,180

Finding the Fourth Proportional to 13,413.28, 20,121.84 and 4,180

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Solution

The fourth proportional to 13,413.28, 20,121.84 and 4,180 is: 6,270.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.28 : 20,121.84 = 4,180 : x
  2. Step 2: Convert to fraction form
    13,413.28/20,121.84 = 4,180/x
  3. Step 3: Cross multiply
    13,413.28x = 20,121.84 × 4,180
  4. Step 4: Simplify right side
    13,413.28x = 84,109,291.20
  5. Step 5: Solve for x
    x = 84,109,291.20/13,413.28
  6. Step 6: Final answer
    x = 6,270.60

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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.