Home / 21,004,859.20-31,507,288.80-8,221,115.20

Finding the Fourth Proportional to 21,004,859.20, 31,507,288.80 and 8,221,115.20

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Solution

The fourth proportional to 21,004,859.20, 31,507,288.80 and 8,221,115.20 is: 12,331,672.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004,859.20 : 31,507,288.80 = 8,221,115.20 : x
  2. Step 2: Convert to fraction form
    21,004,859.20/31,507,288.80 = 8,221,115.20/x
  3. Step 3: Cross multiply
    21,004,859.20x = 31,507,288.80 × 8,221,115.20
  4. Step 4: Simplify right side
    21,004,859.20x = 259,025,050,864,469.78
  5. Step 5: Solve for x
    x = 259,025,050,864,469.78/21,004,859.20
  6. Step 6: Final answer
    x = 12,331,672.80

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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.