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Finding the Fourth Proportional to 19,572.36, 29,358.81 and 5,721.36

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Solution

The fourth proportional to 19,572.36, 29,358.81 and 5,721.36 is: 8,582.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,572.36 : 29,358.81 = 5,721.36 : x
  2. Step 2: Convert to fraction form
    19,572.36/29,358.81 = 5,721.36/x
  3. Step 3: Cross multiply
    19,572.36x = 29,358.81 × 5,721.36
  4. Step 4: Simplify right side
    19,572.36x = 167,972,321.18
  5. Step 5: Solve for x
    x = 167,972,321.18/19,572.36
  6. Step 6: Final answer
    x = 8,582.12

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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.