Home / 20,589.40-28,413.38-11,157.92

Finding the Fourth Proportional to 20,589.40, 28,413.38 and 11,157.92

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Solution

The fourth proportional to 20,589.40, 28,413.38 and 11,157.92 is: 15,397.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.40 : 28,413.38 = 11,157.92 : x
  2. Step 2: Convert to fraction form
    20,589.40/28,413.38 = 11,157.92/x
  3. Step 3: Cross multiply
    20,589.40x = 28,413.38 × 11,157.92
  4. Step 4: Simplify right side
    20,589.40x = 317,034,220.97
  5. Step 5: Solve for x
    x = 317,034,220.97/20,589.40
  6. Step 6: Final answer
    x = 15,397.93

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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.