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Finding the Fourth Proportional to 18,664,051.20, 27,996,076.80 and 5,200,879.20

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Solution

The fourth proportional to 18,664,051.20, 27,996,076.80 and 5,200,879.20 is: 7,801,318.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,664,051.20 : 27,996,076.80 = 5,200,879.20 : x
  2. Step 2: Convert to fraction form
    18,664,051.20/27,996,076.80 = 5,200,879.20/x
  3. Step 3: Cross multiply
    18,664,051.20x = 27,996,076.80 × 5,200,879.20
  4. Step 4: Simplify right side
    18,664,051.20x = 145,604,213,510,722.56
  5. Step 5: Solve for x
    x = 145,604,213,510,722.56/18,664,051.20
  6. Step 6: Final answer
    x = 7,801,318.80

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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.