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Finding the Fourth Proportional to 18,509,914.72, 27,728,713.68 and 12,751,631.20

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Solution

The fourth proportional to 18,509,914.72, 27,728,713.68 and 12,751,631.20 is: 19,102,536.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,509,914.72 : 27,728,713.68 = 12,751,631.20 : x
  2. Step 2: Convert to fraction form
    18,509,914.72/27,728,713.68 = 12,751,631.20/x
  3. Step 3: Cross multiply
    18,509,914.72x = 27,728,713.68 × 12,751,631.20
  4. Step 4: Simplify right side
    18,509,914.72x = 353,586,330,497,754.81
  5. Step 5: Solve for x
    x = 353,586,330,497,754.81/18,509,914.72
  6. Step 6: Final answer
    x = 19,102,536.98

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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.