Home / 21,005,999.10-31,508,998.65-12,481,947.90

Finding the Fourth Proportional to 21,005,999.10, 31,508,998.65 and 12,481,947.90

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Solution

The fourth proportional to 21,005,999.10, 31,508,998.65 and 12,481,947.90 is: 18,722,921.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005,999.10 : 31,508,998.65 = 12,481,947.90 : x
  2. Step 2: Convert to fraction form
    21,005,999.10/31,508,998.65 = 12,481,947.90/x
  3. Step 3: Cross multiply
    21,005,999.10x = 31,508,998.65 × 12,481,947.90
  4. Step 4: Simplify right side
    21,005,999.10x = 393,293,679,530,470.31
  5. Step 5: Solve for x
    x = 393,293,679,530,470.31/21,005,999.10
  6. Step 6: Final answer
    x = 18,722,921.85

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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.