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Finding the Fourth Proportional to 20,127.91, 27,770.87 and 12,581.91

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Solution

The fourth proportional to 20,127.91, 27,770.87 and 12,581.91 is: 17,359.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.91 : 27,770.87 = 12,581.91 : x
  2. Step 2: Convert to fraction form
    20,127.91/27,770.87 = 12,581.91/x
  3. Step 3: Cross multiply
    20,127.91x = 27,770.87 × 12,581.91
  4. Step 4: Simplify right side
    20,127.91x = 349,410,524.05
  5. Step 5: Solve for x
    x = 349,410,524.05/20,127.91
  6. Step 6: Final answer
    x = 17,359.51

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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.