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Finding the Fourth Proportional to 12,619,610.40, 18,892,090.80 and 11,881,408.80

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Solution

The fourth proportional to 12,619,610.40, 18,892,090.80 and 11,881,408.80 is: 17,786,971.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619,610.40 : 18,892,090.80 = 11,881,408.80 : x
  2. Step 2: Convert to fraction form
    12,619,610.40/18,892,090.80 = 11,881,408.80/x
  3. Step 3: Cross multiply
    12,619,610.40x = 18,892,090.80 × 11,881,408.80
  4. Step 4: Simplify right side
    12,619,610.40x = 224,464,653,881,519.06
  5. Step 5: Solve for x
    x = 224,464,653,881,519.06/12,619,610.40
  6. Step 6: Final answer
    x = 17,786,971.77

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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.