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Finding the Fourth Proportional to 11,869,687.20, 17,804,530.80 and 11,019,381.60

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Solution

The fourth proportional to 11,869,687.20, 17,804,530.80 and 11,019,381.60 is: 16,529,072.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,869,687.20 : 17,804,530.80 = 11,019,381.60 : x
  2. Step 2: Convert to fraction form
    11,869,687.20/17,804,530.80 = 11,019,381.60/x
  3. Step 3: Cross multiply
    11,869,687.20x = 17,804,530.80 × 11,019,381.60
  4. Step 4: Simplify right side
    11,869,687.20x = 196,194,919,094,153.28
  5. Step 5: Solve for x
    x = 196,194,919,094,153.28/11,869,687.20
  6. Step 6: Final answer
    x = 16,529,072.40

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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.