Home / 12,687,979.20-19,028,921.43-5,857,990.11

Finding the Fourth Proportional to 12,687,979.20, 19,028,921.43 and 5,857,990.11

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Solution

The fourth proportional to 12,687,979.20, 19,028,921.43 and 5,857,990.11 is: 8,785,578.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687,979.20 : 19,028,921.43 = 5,857,990.11 : x
  2. Step 2: Convert to fraction form
    12,687,979.20/19,028,921.43 = 5,857,990.11/x
  3. Step 3: Cross multiply
    12,687,979.20x = 19,028,921.43 × 5,857,990.11
  4. Step 4: Simplify right side
    12,687,979.20x = 111,471,233,540,907.06
  5. Step 5: Solve for x
    x = 111,471,233,540,907.06/12,687,979.20
  6. Step 6: Final answer
    x = 8,785,578.21

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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.