Home / 12,920,665.60-19,380,998.40-3,945,203.20

Finding the Fourth Proportional to 12,920,665.60, 19,380,998.40 and 3,945,203.20

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Solution

The fourth proportional to 12,920,665.60, 19,380,998.40 and 3,945,203.20 is: 5,917,804.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,920,665.60 : 19,380,998.40 = 3,945,203.20 : x
  2. Step 2: Convert to fraction form
    12,920,665.60/19,380,998.40 = 3,945,203.20/x
  3. Step 3: Cross multiply
    12,920,665.60x = 19,380,998.40 × 3,945,203.20
  4. Step 4: Simplify right side
    12,920,665.60x = 76,461,976,906,874.88
  5. Step 5: Solve for x
    x = 76,461,976,906,874.88/12,920,665.60
  6. Step 6: Final answer
    x = 5,917,804.80

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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.