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Finding the Fourth Proportional to 7,978,371.13, 11,967,556.96 and 1,994,739.13

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Solution

The fourth proportional to 7,978,371.13, 11,967,556.96 and 1,994,739.13 is: 2,992,108.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978,371.13 : 11,967,556.96 = 1,994,739.13 : x
  2. Step 2: Convert to fraction form
    7,978,371.13/11,967,556.96 = 1,994,739.13/x
  3. Step 3: Cross multiply
    7,978,371.13x = 11,967,556.96 × 1,994,739.13
  4. Step 4: Simplify right side
    7,978,371.13x = 23,872,154,158,615.84
  5. Step 5: Solve for x
    x = 23,872,154,158,615.84/7,978,371.13
  6. Step 6: Final answer
    x = 2,992,108.76

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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.