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Finding the Fourth Proportional to 13,937,201.20, 20,905,801.80 and 11,067,419.80

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Solution

The fourth proportional to 13,937,201.20, 20,905,801.80 and 11,067,419.80 is: 16,601,129.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,937,201.20 : 20,905,801.80 = 11,067,419.80 : x
  2. Step 2: Convert to fraction form
    13,937,201.20/20,905,801.80 = 11,067,419.80/x
  3. Step 3: Cross multiply
    13,937,201.20x = 20,905,801.80 × 11,067,419.80
  4. Step 4: Simplify right side
    13,937,201.20x = 231,373,284,776,195.66
  5. Step 5: Solve for x
    x = 231,373,284,776,195.66/13,937,201.20
  6. Step 6: Final answer
    x = 16,601,129.70

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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.