Home / 13,413.82-20,121.16-6,394.60

Finding the Fourth Proportional to 13,413.82, 20,121.16 and 6,394.60

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Solution

The fourth proportional to 13,413.82, 20,121.16 and 6,394.60 is: 9,592.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.82 : 20,121.16 = 6,394.60 : x
  2. Step 2: Convert to fraction form
    13,413.82/20,121.16 = 6,394.60/x
  3. Step 3: Cross multiply
    13,413.82x = 20,121.16 × 6,394.60
  4. Step 4: Simplify right side
    13,413.82x = 128,666,804.05
  5. Step 5: Solve for x
    x = 128,666,804.05/13,413.82
  6. Step 6: Final answer
    x = 9,592.11

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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.