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Finding the Fourth Proportional to 7,978,371.39, 11,967,557.34 and 1,994,739.39

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Solution

The fourth proportional to 7,978,371.39, 11,967,557.34 and 1,994,739.39 is: 2,992,109.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978,371.39 : 11,967,557.34 = 1,994,739.39 : x
  2. Step 2: Convert to fraction form
    7,978,371.39/11,967,557.34 = 1,994,739.39/x
  3. Step 3: Cross multiply
    7,978,371.39x = 11,967,557.34 × 1,994,739.39
  4. Step 4: Simplify right side
    7,978,371.39x = 23,872,158,028,181.62
  5. Step 5: Solve for x
    x = 23,872,158,028,181.62/7,978,371.39
  6. Step 6: Final answer
    x = 2,992,109.15

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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.