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Finding the Fourth Proportional to 18,674,791.80, 28,012,187.70 and 11,462,940.60

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Solution

The fourth proportional to 18,674,791.80, 28,012,187.70 and 11,462,940.60 is: 17,194,410.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,674,791.80 : 28,012,187.70 = 11,462,940.60 : x
  2. Step 2: Convert to fraction form
    18,674,791.80/28,012,187.70 = 11,462,940.60/x
  3. Step 3: Cross multiply
    18,674,791.80x = 28,012,187.70 × 11,462,940.60
  4. Step 4: Simplify right side
    18,674,791.80x = 321,102,043,681,150.62
  5. Step 5: Solve for x
    x = 321,102,043,681,150.62/18,674,791.80
  6. Step 6: Final answer
    x = 17,194,410.90

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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.