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Finding the Fourth Proportional to 11,291.60, 16,918.82 and 5,042.22

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Solution

The fourth proportional to 11,291.60, 16,918.82 and 5,042.22 is: 7,555.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,291.60 : 16,918.82 = 5,042.22 : x
  2. Step 2: Convert to fraction form
    11,291.60/16,918.82 = 5,042.22/x
  3. Step 3: Cross multiply
    11,291.60x = 16,918.82 × 5,042.22
  4. Step 4: Simplify right side
    11,291.60x = 85,308,412.58
  5. Step 5: Solve for x
    x = 85,308,412.58/11,291.60
  6. Step 6: Final answer
    x = 7,555.03

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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.