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Finding the Fourth Proportional to 18,689,558.40, 27,987,098.40 and 12,265,027.20

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Solution

The fourth proportional to 18,689,558.40, 27,987,098.40 and 12,265,027.20 is: 18,366,540.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,689,558.40 : 27,987,098.40 = 12,265,027.20 : x
  2. Step 2: Convert to fraction form
    18,689,558.40/27,987,098.40 = 12,265,027.20/x
  3. Step 3: Cross multiply
    18,689,558.40x = 27,987,098.40 × 12,265,027.20
  4. Step 4: Simplify right side
    18,689,558.40x = 343,262,523,125,076.44
  5. Step 5: Solve for x
    x = 343,262,523,125,076.44/18,689,558.40
  6. Step 6: Final answer
    x = 18,366,540.06

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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.