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Finding the Fourth Proportional to 9,404,583.78, 12,978,467.82 and 5,275,530.21

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Solution

The fourth proportional to 9,404,583.78, 12,978,467.82 and 5,275,530.21 is: 7,280,311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,404,583.78 : 12,978,467.82 = 5,275,530.21 : x
  2. Step 2: Convert to fraction form
    9,404,583.78/12,978,467.82 = 5,275,530.21/x
  3. Step 3: Cross multiply
    9,404,583.78x = 12,978,467.82 × 5,275,530.21
  4. Step 4: Simplify right side
    9,404,583.78x = 68,468,299,063,922.84
  5. Step 5: Solve for x
    x = 68,468,299,063,922.84/9,404,583.78
  6. Step 6: Final answer
    x = 7,280,311.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.