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Finding the Fourth Proportional to 11,720,999.40, 17,581,499.10 and 11,511,047.40

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Solution

The fourth proportional to 11,720,999.40, 17,581,499.10 and 11,511,047.40 is: 17,266,571.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,720,999.40 : 17,581,499.10 = 11,511,047.40 : x
  2. Step 2: Convert to fraction form
    11,720,999.40/17,581,499.10 = 11,511,047.40/x
  3. Step 3: Cross multiply
    11,720,999.40x = 17,581,499.10 × 11,511,047.40
  4. Step 4: Simplify right side
    11,720,999.40x = 202,381,469,503,157.38
  5. Step 5: Solve for x
    x = 202,381,469,503,157.38/11,720,999.40
  6. Step 6: Final answer
    x = 17,266,571.10

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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.