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Finding the Fourth Proportional to 8,644,879.20, 12,942,435.60 and 5,285,647.20

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Solution

The fourth proportional to 8,644,879.20, 12,942,435.60 and 5,285,647.20 is: 7,913,256.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,644,879.20 : 12,942,435.60 = 5,285,647.20 : x
  2. Step 2: Convert to fraction form
    8,644,879.20/12,942,435.60 = 5,285,647.20/x
  3. Step 3: Cross multiply
    8,644,879.20x = 12,942,435.60 × 5,285,647.20
  4. Step 4: Simplify right side
    8,644,879.20x = 68,409,148,490,320.32
  5. Step 5: Solve for x
    x = 68,409,148,490,320.32/8,644,879.20
  6. Step 6: Final answer
    x = 7,913,256.73

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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.