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Finding the Fourth Proportional to 13,998,469.70, 20,997,704.55 and 11,606,985.20

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Solution

The fourth proportional to 13,998,469.70, 20,997,704.55 and 11,606,985.20 is: 17,410,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998,469.70 : 20,997,704.55 = 11,606,985.20 : x
  2. Step 2: Convert to fraction form
    13,998,469.70/20,997,704.55 = 11,606,985.20/x
  3. Step 3: Cross multiply
    13,998,469.70x = 20,997,704.55 × 11,606,985.20
  4. Step 4: Simplify right side
    13,998,469.70x = 243,720,045,945,822.66
  5. Step 5: Solve for x
    x = 243,720,045,945,822.66/13,998,469.70
  6. Step 6: Final answer
    x = 17,410,477.80

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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.