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Finding the Fourth Proportional to 11,988,791.88, 17,978,454.18 and 4,798,985.64

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Solution

The fourth proportional to 11,988,791.88, 17,978,454.18 and 4,798,985.64 is: 7,196,583.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,988,791.88 : 17,978,454.18 = 4,798,985.64 : x
  2. Step 2: Convert to fraction form
    11,988,791.88/17,978,454.18 = 4,798,985.64/x
  3. Step 3: Cross multiply
    11,988,791.88x = 17,978,454.18 × 4,798,985.64
  4. Step 4: Simplify right side
    11,988,791.88x = 86,278,343,439,217.97
  5. Step 5: Solve for x
    x = 86,278,343,439,217.97/11,988,791.88
  6. Step 6: Final answer
    x = 7,196,583.63

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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.