Home / 21,305,314.30-31,939,309.05-12,789,039.10

Finding the Fourth Proportional to 21,305,314.30, 31,939,309.05 and 12,789,039.10

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Solution

The fourth proportional to 21,305,314.30, 31,939,309.05 and 12,789,039.10 is: 19,172,356.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305,314.30 : 31,939,309.05 = 12,789,039.10 : x
  2. Step 2: Convert to fraction form
    21,305,314.30/31,939,309.05 = 12,789,039.10/x
  3. Step 3: Cross multiply
    21,305,314.30x = 31,939,309.05 × 12,789,039.10
  4. Step 4: Simplify right side
    21,305,314.30x = 408,473,072,267,433.88
  5. Step 5: Solve for x
    x = 408,473,072,267,433.88/21,305,314.30
  6. Step 6: Final answer
    x = 19,172,356.09

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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.