Home / 18,012.88-27,028.83-12,781.69

Finding the Fourth Proportional to 18,012.88, 27,028.83 and 12,781.69

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Solution

The fourth proportional to 18,012.88, 27,028.83 and 12,781.69 is: 19,179.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,012.88 : 27,028.83 = 12,781.69 : x
  2. Step 2: Convert to fraction form
    18,012.88/27,028.83 = 12,781.69/x
  3. Step 3: Cross multiply
    18,012.88x = 27,028.83 × 12,781.69
  4. Step 4: Simplify right side
    18,012.88x = 345,474,126.12
  5. Step 5: Solve for x
    x = 345,474,126.12/18,012.88
  6. Step 6: Final answer
    x = 19,179.28

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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.