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Finding the Fourth Proportional to 11,978,272.40, 17,967,408.60 and 7,183,493.60

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Solution

The fourth proportional to 11,978,272.40, 17,967,408.60 and 7,183,493.60 is: 10,775,240.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978,272.40 : 17,967,408.60 = 7,183,493.60 : x
  2. Step 2: Convert to fraction form
    11,978,272.40/17,967,408.60 = 7,183,493.60/x
  3. Step 3: Cross multiply
    11,978,272.40x = 17,967,408.60 × 7,183,493.60
  4. Step 4: Simplify right side
    11,978,272.40x = 129,068,764,686,684.97
  5. Step 5: Solve for x
    x = 129,068,764,686,684.97/11,978,272.40
  6. Step 6: Final answer
    x = 10,775,240.40

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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.