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Finding the Fourth Proportional to 12,348,607.20, 18,511,851.60 and 8,090,815.20

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Solution

The fourth proportional to 12,348,607.20, 18,511,851.60 and 8,090,815.20 is: 12,128,976.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,348,607.20 : 18,511,851.60 = 8,090,815.20 : x
  2. Step 2: Convert to fraction form
    12,348,607.20/18,511,851.60 = 8,090,815.20/x
  3. Step 3: Cross multiply
    12,348,607.20x = 18,511,851.60 × 8,090,815.20
  4. Step 4: Simplify right side
    12,348,607.20x = 149,775,970,305,424.34
  5. Step 5: Solve for x
    x = 149,775,970,305,424.34/12,348,607.20
  6. Step 6: Final answer
    x = 12,128,976.81

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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.