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Finding the Fourth Proportional to 13,752,635.76, 18,978,296.64 and 7,641,078.96

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Solution

The fourth proportional to 13,752,635.76, 18,978,296.64 and 7,641,078.96 is: 10,544,499.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,752,635.76 : 18,978,296.64 = 7,641,078.96 : x
  2. Step 2: Convert to fraction form
    13,752,635.76/18,978,296.64 = 7,641,078.96/x
  3. Step 3: Cross multiply
    13,752,635.76x = 18,978,296.64 × 7,641,078.96
  4. Step 4: Simplify right side
    13,752,635.76x = 145,014,663,152,542.69
  5. Step 5: Solve for x
    x = 145,014,663,152,542.69/13,752,635.76
  6. Step 6: Final answer
    x = 10,544,499.66

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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.