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Finding the Fourth Proportional to 18,356,608.80, 27,545,410.80 and 12,680,906.40

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Solution

The fourth proportional to 18,356,608.80, 27,545,410.80 and 12,680,906.40 is: 19,028,611.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356,608.80 : 27,545,410.80 = 12,680,906.40 : x
  2. Step 2: Convert to fraction form
    18,356,608.80/27,545,410.80 = 12,680,906.40/x
  3. Step 3: Cross multiply
    18,356,608.80x = 27,545,410.80 × 12,680,906.40
  4. Step 4: Simplify right side
    18,356,608.80x = 349,300,776,104,349.12
  5. Step 5: Solve for x
    x = 349,300,776,104,349.12/18,356,608.80
  6. Step 6: Final answer
    x = 19,028,611.43

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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.