Home / 20,221.88-27,923.39-12,680.84

Finding the Fourth Proportional to 20,221.88, 27,923.39 and 12,680.84

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Solution

The fourth proportional to 20,221.88, 27,923.39 and 12,680.84 is: 17,510.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.88 : 27,923.39 = 12,680.84 : x
  2. Step 2: Convert to fraction form
    20,221.88/27,923.39 = 12,680.84/x
  3. Step 3: Cross multiply
    20,221.88x = 27,923.39 × 12,680.84
  4. Step 4: Simplify right side
    20,221.88x = 354,091,837.83
  5. Step 5: Solve for x
    x = 354,091,837.83/20,221.88
  6. Step 6: Final answer
    x = 17,510.34

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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.