Home / 13,857.80-20,786.76-3,997.13

Finding the Fourth Proportional to 13,857.80, 20,786.76 and 3,997.13

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Solution

The fourth proportional to 13,857.80, 20,786.76 and 3,997.13 is: 5,995.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,857.80 : 20,786.76 = 3,997.13 : x
  2. Step 2: Convert to fraction form
    13,857.80/20,786.76 = 3,997.13/x
  3. Step 3: Cross multiply
    13,857.80x = 20,786.76 × 3,997.13
  4. Step 4: Simplify right side
    13,857.80x = 83,087,278.07
  5. Step 5: Solve for x
    x = 83,087,278.07/13,857.80
  6. Step 6: Final answer
    x = 5,995.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.