Home / 20,081.68-27,706.08-12,120.88

Finding the Fourth Proportional to 20,081.68, 27,706.08 and 12,120.88

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Solution

The fourth proportional to 20,081.68, 27,706.08 and 12,120.88 is: 16,722.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.68 : 27,706.08 = 12,120.88 : x
  2. Step 2: Convert to fraction form
    20,081.68/27,706.08 = 12,120.88/x
  3. Step 3: Cross multiply
    20,081.68x = 27,706.08 × 12,120.88
  4. Step 4: Simplify right side
    20,081.68x = 335,822,070.95
  5. Step 5: Solve for x
    x = 335,822,070.95/20,081.68
  6. Step 6: Final answer
    x = 16,722.81

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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.