Home / 13,413.50-20,121.36-4,179.50

Finding the Fourth Proportional to 13,413.50, 20,121.36 and 4,179.50

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Solution

The fourth proportional to 13,413.50, 20,121.36 and 4,179.50 is: 6,269.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.50 : 20,121.36 = 4,179.50 : x
  2. Step 2: Convert to fraction form
    13,413.50/20,121.36 = 4,179.50/x
  3. Step 3: Cross multiply
    13,413.50x = 20,121.36 × 4,179.50
  4. Step 4: Simplify right side
    13,413.50x = 84,097,224.12
  5. Step 5: Solve for x
    x = 84,097,224.12/13,413.50
  6. Step 6: Final answer
    x = 6,269.60

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1.5x scale

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.