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Finding the Fourth Proportional to 7,980,940.06, 11,971,410.25 and 1,915,671.78

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Solution

The fourth proportional to 7,980,940.06, 11,971,410.25 and 1,915,671.78 is: 2,873,507.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,980,940.06 : 11,971,410.25 = 1,915,671.78 : x
  2. Step 2: Convert to fraction form
    7,980,940.06/11,971,410.25 = 1,915,671.78/x
  3. Step 3: Cross multiply
    7,980,940.06x = 11,971,410.25 × 1,915,671.78
  4. Step 4: Simplify right side
    7,980,940.06x = 22,933,292,773,149.39
  5. Step 5: Solve for x
    x = 22,933,292,773,149.39/7,980,940.06
  6. Step 6: Final answer
    x = 2,873,507.71

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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.