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Finding the Fourth Proportional to 13,572.52, 20,351.90 and 4,806.20

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Solution

The fourth proportional to 13,572.52, 20,351.90 and 4,806.20 is: 7,206.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.52 : 20,351.90 = 4,806.20 : x
  2. Step 2: Convert to fraction form
    13,572.52/20,351.90 = 4,806.20/x
  3. Step 3: Cross multiply
    13,572.52x = 20,351.90 × 4,806.20
  4. Step 4: Simplify right side
    13,572.52x = 97,815,301.78
  5. Step 5: Solve for x
    x = 97,815,301.78/13,572.52
  6. Step 6: Final answer
    x = 7,206.86

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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.