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Finding the Fourth Proportional to 12,598,903.90, 18,901,855.05 and 5,413,879.90

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Solution

The fourth proportional to 12,598,903.90, 18,901,855.05 and 5,413,879.90 is: 8,122,323.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,598,903.90 : 18,901,855.05 = 5,413,879.90 : x
  2. Step 2: Convert to fraction form
    12,598,903.90/18,901,855.05 = 5,413,879.90/x
  3. Step 3: Cross multiply
    12,598,903.90x = 18,901,855.05 × 5,413,879.90
  4. Step 4: Simplify right side
    12,598,903.90x = 102,332,373,127,908.50
  5. Step 5: Solve for x
    x = 102,332,373,127,908.50/12,598,903.90
  6. Step 6: Final answer
    x = 8,122,323.49

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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.