Home / 18,120.56-27,180.69-11,919.74

Finding the Fourth Proportional to 18,120.56, 27,180.69 and 11,919.74

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Solution

The fourth proportional to 18,120.56, 27,180.69 and 11,919.74 is: 17,879.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.56 : 27,180.69 = 11,919.74 : x
  2. Step 2: Convert to fraction form
    18,120.56/27,180.69 = 11,919.74/x
  3. Step 3: Cross multiply
    18,120.56x = 27,180.69 × 11,919.74
  4. Step 4: Simplify right side
    18,120.56x = 323,986,757.82
  5. Step 5: Solve for x
    x = 323,986,757.82/18,120.56
  6. Step 6: Final answer
    x = 17,879.51

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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.