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Finding the Fourth Proportional to 19,917.90, 29,881.68 and 6,066.90

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Solution

The fourth proportional to 19,917.90, 29,881.68 and 6,066.90 is: 9,101.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917.90 : 29,881.68 = 6,066.90 : x
  2. Step 2: Convert to fraction form
    19,917.90/29,881.68 = 6,066.90/x
  3. Step 3: Cross multiply
    19,917.90x = 29,881.68 × 6,066.90
  4. Step 4: Simplify right side
    19,917.90x = 181,289,164.39
  5. Step 5: Solve for x
    x = 181,289,164.39/19,917.90
  6. Step 6: Final answer
    x = 9,101.82

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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.