Home / 20,128.05-27,772.56-12,170.70

Finding the Fourth Proportional to 20,128.05, 27,772.56 and 12,170.70

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Solution

The fourth proportional to 20,128.05, 27,772.56 and 12,170.70 is: 16,793.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.05 : 27,772.56 = 12,170.70 : x
  2. Step 2: Convert to fraction form
    20,128.05/27,772.56 = 12,170.70/x
  3. Step 3: Cross multiply
    20,128.05x = 27,772.56 × 12,170.70
  4. Step 4: Simplify right side
    20,128.05x = 338,011,495.99
  5. Step 5: Solve for x
    x = 338,011,495.99/20,128.05
  6. Step 6: Final answer
    x = 16,793.06

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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.