Home / 3,909.48-5,378.70-3,413.28

Finding the Fourth Proportional to 3,909.48, 5,378.70 and 3,413.28

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Solution

The fourth proportional to 3,909.48, 5,378.70 and 3,413.28 is: 4,696.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,909.48 : 5,378.70 = 3,413.28 : x
  2. Step 2: Convert to fraction form
    3,909.48/5,378.70 = 3,413.28/x
  3. Step 3: Cross multiply
    3,909.48x = 5,378.70 × 3,413.28
  4. Step 4: Simplify right side
    3,909.48x = 18,359,009.14
  5. Step 5: Solve for x
    x = 18,359,009.14/3,909.48
  6. Step 6: Final answer
    x = 4,696.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.