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Finding the Fourth Proportional to 39,158.51, 58,747.41 and 11,456.51

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Solution

The fourth proportional to 39,158.51, 58,747.41 and 11,456.51 is: 17,187.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,158.51 : 58,747.41 = 11,456.51 : x
  2. Step 2: Convert to fraction form
    39,158.51/58,747.41 = 11,456.51/x
  3. Step 3: Cross multiply
    39,158.51x = 58,747.41 × 11,456.51
  4. Step 4: Simplify right side
    39,158.51x = 673,039,996.40
  5. Step 5: Solve for x
    x = 673,039,996.40/39,158.51
  6. Step 6: Final answer
    x = 17,187.58

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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.