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Finding the Fourth Proportional to 12,978,007.38, 19,467,053.46 and 4,888,811.88

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Solution

The fourth proportional to 12,978,007.38, 19,467,053.46 and 4,888,811.88 is: 7,333,233.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,978,007.38 : 19,467,053.46 = 4,888,811.88 : x
  2. Step 2: Convert to fraction form
    12,978,007.38/19,467,053.46 = 4,888,811.88/x
  3. Step 3: Cross multiply
    12,978,007.38x = 19,467,053.46 × 4,888,811.88
  4. Step 4: Simplify right side
    12,978,007.38x = 95,170,762,223,843.11
  5. Step 5: Solve for x
    x = 95,170,762,223,843.11/12,978,007.38
  6. Step 6: Final answer
    x = 7,333,233.79

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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.