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Finding the Fourth Proportional to 11,921.97, 17,882.97 and 4,130.79

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Solution

The fourth proportional to 11,921.97, 17,882.97 and 4,130.79 is: 6,196.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.97 : 17,882.97 = 4,130.79 : x
  2. Step 2: Convert to fraction form
    11,921.97/17,882.97 = 4,130.79/x
  3. Step 3: Cross multiply
    11,921.97x = 17,882.97 × 4,130.79
  4. Step 4: Simplify right side
    11,921.97x = 73,870,793.65
  5. Step 5: Solve for x
    x = 73,870,793.65/11,921.97
  6. Step 6: Final answer
    x = 6,196.19

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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.