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Finding the Fourth Proportional to 18,581,805.20, 27,872,707.80 and 18,262,940.60

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Solution

The fourth proportional to 18,581,805.20, 27,872,707.80 and 18,262,940.60 is: 27,394,410.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,581,805.20 : 27,872,707.80 = 18,262,940.60 : x
  2. Step 2: Convert to fraction form
    18,581,805.20/27,872,707.80 = 18,262,940.60/x
  3. Step 3: Cross multiply
    18,581,805.20x = 27,872,707.80 × 18,262,940.60
  4. Step 4: Simplify right side
    18,581,805.20x = 509,037,606,912,556.75
  5. Step 5: Solve for x
    x = 509,037,606,912,556.75/18,581,805.20
  6. Step 6: Final answer
    x = 27,394,410.90

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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.