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Finding the Fourth Proportional to 39,393.81, 59,090.78 and 11,691.81

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Solution

The fourth proportional to 39,393.81, 59,090.78 and 11,691.81 is: 17,537.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,393.81 : 59,090.78 = 11,691.81 : x
  2. Step 2: Convert to fraction form
    39,393.81/59,090.78 = 11,691.81/x
  3. Step 3: Cross multiply
    39,393.81x = 59,090.78 × 11,691.81
  4. Step 4: Simplify right side
    39,393.81x = 690,878,201.74
  5. Step 5: Solve for x
    x = 690,878,201.74/39,393.81
  6. Step 6: Final answer
    x = 17,537.74

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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.