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Finding the Fourth Proportional to 18,451,978.80, 27,677,968.20 and 13,350,145.20

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Solution

The fourth proportional to 18,451,978.80, 27,677,968.20 and 13,350,145.20 is: 20,025,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,451,978.80 : 27,677,968.20 = 13,350,145.20 : x
  2. Step 2: Convert to fraction form
    18,451,978.80/27,677,968.20 = 13,350,145.20/x
  3. Step 3: Cross multiply
    18,451,978.80x = 27,677,968.20 × 13,350,145.20
  4. Step 4: Simplify right side
    18,451,978.80x = 369,504,894,310,982.62
  5. Step 5: Solve for x
    x = 369,504,894,310,982.62/18,451,978.80
  6. Step 6: Final answer
    x = 20,025,217.80

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1.5x scale

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.