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Finding the Fourth Proportional to 13,603,918.60, 20,405,877.90 and 13,603,918.60

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Solution

The fourth proportional to 13,603,918.60, 20,405,877.90 and 13,603,918.60 is: 20,405,877.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,603,918.60 : 20,405,877.90 = 13,603,918.60 : x
  2. Step 2: Convert to fraction form
    13,603,918.60/20,405,877.90 = 13,603,918.60/x
  3. Step 3: Cross multiply
    13,603,918.60x = 20,405,877.90 × 13,603,918.60
  4. Step 4: Simplify right side
    13,603,918.60x = 277,599,901,913,138.91
  5. Step 5: Solve for x
    x = 277,599,901,913,138.91/13,603,918.60
  6. Step 6: Final answer
    x = 20,405,877.90

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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.