Home / 5,413.20-8,119.80-2,126.40

Finding the Fourth Proportional to 5,413.20, 8,119.80 and 2,126.40

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Solution

The fourth proportional to 5,413.20, 8,119.80 and 2,126.40 is: 3,189.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.20 : 8,119.80 = 2,126.40 : x
  2. Step 2: Convert to fraction form
    5,413.20/8,119.80 = 2,126.40/x
  3. Step 3: Cross multiply
    5,413.20x = 8,119.80 × 2,126.40
  4. Step 4: Simplify right side
    5,413.20x = 17,265,942.72
  5. Step 5: Solve for x
    x = 17,265,942.72/5,413.20
  6. Step 6: Final answer
    x = 3,189.60

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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.