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Finding the Fourth Proportional to 18,490,632.80, 27,735,949.20 and 12,444,015.20

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Solution

The fourth proportional to 18,490,632.80, 27,735,949.20 and 12,444,015.20 is: 18,666,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,490,632.80 : 27,735,949.20 = 12,444,015.20 : x
  2. Step 2: Convert to fraction form
    18,490,632.80/27,735,949.20 = 12,444,015.20/x
  3. Step 3: Cross multiply
    18,490,632.80x = 27,735,949.20 × 12,444,015.20
  4. Step 4: Simplify right side
    18,490,632.80x = 345,146,573,431,227.81
  5. Step 5: Solve for x
    x = 345,146,573,431,227.81/18,490,632.80
  6. Step 6: Final answer
    x = 18,666,022.80

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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.