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Finding the Fourth Proportional to 20,179,505.70, 30,348,974.70 and 18,106,885.80

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Solution

The fourth proportional to 20,179,505.70, 30,348,974.70 and 18,106,885.80 is: 27,231,857.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179,505.70 : 30,348,974.70 = 18,106,885.80 : x
  2. Step 2: Convert to fraction form
    20,179,505.70/30,348,974.70 = 18,106,885.80/x
  3. Step 3: Cross multiply
    20,179,505.70x = 30,348,974.70 × 18,106,885.80
  4. Step 4: Simplify right side
    20,179,505.70x = 549,525,419,039,989.25
  5. Step 5: Solve for x
    x = 549,525,419,039,989.25/20,179,505.70
  6. Step 6: Final answer
    x = 27,231,857.27

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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.