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Finding the Fourth Proportional to 18,649,042.45, 27,978,043.07 and 7,134,321.40

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Solution

The fourth proportional to 18,649,042.45, 27,978,043.07 and 7,134,321.40 is: 10,703,195.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649,042.45 : 27,978,043.07 = 7,134,321.40 : x
  2. Step 2: Convert to fraction form
    18,649,042.45/27,978,043.07 = 7,134,321.40/x
  3. Step 3: Cross multiply
    18,649,042.45x = 27,978,043.07 × 7,134,321.40
  4. Step 4: Simplify right side
    18,649,042.45x = 199,604,351,352,313.41
  5. Step 5: Solve for x
    x = 199,604,351,352,313.41/18,649,042.45
  6. Step 6: Final answer
    x = 10,703,195.72

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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.