Home / 21,290,998.80-31,936,498.20-12,305,053.20

Finding the Fourth Proportional to 21,290,998.80, 31,936,498.20 and 12,305,053.20

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Solution

The fourth proportional to 21,290,998.80, 31,936,498.20 and 12,305,053.20 is: 18,457,579.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,290,998.80 : 31,936,498.20 = 12,305,053.20 : x
  2. Step 2: Convert to fraction form
    21,290,998.80/31,936,498.20 = 12,305,053.20/x
  3. Step 3: Cross multiply
    21,290,998.80x = 31,936,498.20 × 12,305,053.20
  4. Step 4: Simplify right side
    21,290,998.80x = 392,980,309,372,704.19
  5. Step 5: Solve for x
    x = 392,980,309,372,704.19/21,290,998.80
  6. Step 6: Final answer
    x = 18,457,579.80

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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.