Home / 21,005,251.20-31,507,876.80-8,221,507.20

Finding the Fourth Proportional to 21,005,251.20, 31,507,876.80 and 8,221,507.20

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Solution

The fourth proportional to 21,005,251.20, 31,507,876.80 and 8,221,507.20 is: 12,332,260.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,251.20 : 31,507,876.80 = 8,221,507.20 : x
  2. Step 2: Convert to fraction form
    21,005,251.20/31,507,876.80 = 8,221,507.20/x
  3. Step 3: Cross multiply
    21,005,251.20x = 31,507,876.80 × 8,221,507.20
  4. Step 4: Simplify right side
    21,005,251.20x = 259,042,235,967,912.97
  5. Step 5: Solve for x
    x = 259,042,235,967,912.97/21,005,251.20
  6. Step 6: Final answer
    x = 12,332,260.80

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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.