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Finding the Fourth Proportional to 19,572.47, 29,363.58 and 5,721.47

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Solution

The fourth proportional to 19,572.47, 29,363.58 and 5,721.47 is: 8,583.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,572.47 : 29,363.58 = 5,721.47 : x
  2. Step 2: Convert to fraction form
    19,572.47/29,363.58 = 5,721.47/x
  3. Step 3: Cross multiply
    19,572.47x = 29,363.58 × 5,721.47
  4. Step 4: Simplify right side
    19,572.47x = 168,002,805.36
  5. Step 5: Solve for x
    x = 168,002,805.36/19,572.47
  6. Step 6: Final answer
    x = 8,583.63

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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.