Home / 20,078.94-27,708.91-12,121.18

Finding the Fourth Proportional to 20,078.94, 27,708.91 and 12,121.18

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Solution

The fourth proportional to 20,078.94, 27,708.91 and 12,121.18 is: 16,727.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,078.94 : 27,708.91 = 12,121.18 : x
  2. Step 2: Convert to fraction form
    20,078.94/27,708.91 = 12,121.18/x
  3. Step 3: Cross multiply
    20,078.94x = 27,708.91 × 12,121.18
  4. Step 4: Simplify right side
    20,078.94x = 335,864,685.71
  5. Step 5: Solve for x
    x = 335,864,685.71/20,078.94
  6. Step 6: Final answer
    x = 16,727.21

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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.