Home / 6,413.20-9,619.80-3,918.40

Finding the Fourth Proportional to 6,413.20, 9,619.80 and 3,918.40

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Solution

The fourth proportional to 6,413.20, 9,619.80 and 3,918.40 is: 5,877.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,413.20 : 9,619.80 = 3,918.40 : x
  2. Step 2: Convert to fraction form
    6,413.20/9,619.80 = 3,918.40/x
  3. Step 3: Cross multiply
    6,413.20x = 9,619.80 × 3,918.40
  4. Step 4: Simplify right side
    6,413.20x = 37,694,224.32
  5. Step 5: Solve for x
    x = 37,694,224.32/6,413.20
  6. Step 6: Final answer
    x = 5,877.60

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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.