Home / 20,406.35-30,608.09-5,413.13

Finding the Fourth Proportional to 20,406.35, 30,608.09 and 5,413.13

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Solution

The fourth proportional to 20,406.35, 30,608.09 and 5,413.13 is: 8,119.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.35 : 30,608.09 = 5,413.13 : x
  2. Step 2: Convert to fraction form
    20,406.35/30,608.09 = 5,413.13/x
  3. Step 3: Cross multiply
    20,406.35x = 30,608.09 × 5,413.13
  4. Step 4: Simplify right side
    20,406.35x = 165,685,570.22
  5. Step 5: Solve for x
    x = 165,685,570.22/20,406.35
  6. Step 6: Final answer
    x = 8,119.31

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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.