Home / 13,413.57-20,120.78-6,394.35

Finding the Fourth Proportional to 13,413.57, 20,120.78 and 6,394.35

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Solution

The fourth proportional to 13,413.57, 20,120.78 and 6,394.35 is: 9,591.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.57 : 20,120.78 = 6,394.35 : x
  2. Step 2: Convert to fraction form
    13,413.57/20,120.78 = 6,394.35/x
  3. Step 3: Cross multiply
    13,413.57x = 20,120.78 × 6,394.35
  4. Step 4: Simplify right side
    13,413.57x = 128,659,309.59
  5. Step 5: Solve for x
    x = 128,659,309.59/13,413.57
  6. Step 6: Final answer
    x = 9,591.73

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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.