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Finding the Fourth Proportional to 21,445.92, 32,163.12 and 5,859.90

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Solution

The fourth proportional to 21,445.92, 32,163.12 and 5,859.90 is: 8,788.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,445.92 : 32,163.12 = 5,859.90 : x
  2. Step 2: Convert to fraction form
    21,445.92/32,163.12 = 5,859.90/x
  3. Step 3: Cross multiply
    21,445.92x = 32,163.12 × 5,859.90
  4. Step 4: Simplify right side
    21,445.92x = 188,472,666.89
  5. Step 5: Solve for x
    x = 188,472,666.89/21,445.92
  6. Step 6: Final answer
    x = 8,788.28

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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.