Home / 20,121.47-27,767.40-11,169.05

Finding the Fourth Proportional to 20,121.47, 27,767.40 and 11,169.05

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Solution

The fourth proportional to 20,121.47, 27,767.40 and 11,169.05 is: 15,413.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.47 : 27,767.40 = 11,169.05 : x
  2. Step 2: Convert to fraction form
    20,121.47/27,767.40 = 11,169.05/x
  3. Step 3: Cross multiply
    20,121.47x = 27,767.40 × 11,169.05
  4. Step 4: Simplify right side
    20,121.47x = 310,135,340.13
  5. Step 5: Solve for x
    x = 310,135,340.13/20,121.47
  6. Step 6: Final answer
    x = 15,413.16

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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.