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Finding the Fourth Proportional to 18,209,906.80, 27,314,860.20 and 18,103,618.60

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Solution

The fourth proportional to 18,209,906.80, 27,314,860.20 and 18,103,618.60 is: 27,155,427.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,209,906.80 : 27,314,860.20 = 18,103,618.60 : x
  2. Step 2: Convert to fraction form
    18,209,906.80/27,314,860.20 = 18,103,618.60/x
  3. Step 3: Cross multiply
    18,209,906.80x = 27,314,860.20 × 18,103,618.60
  4. Step 4: Simplify right side
    18,209,906.80x = 494,497,811,173,119.75
  5. Step 5: Solve for x
    x = 494,497,811,173,119.75/18,209,906.80
  6. Step 6: Final answer
    x = 27,155,427.90

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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.