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Finding the Fourth Proportional to 16,711.72, 25,063.26 and 7,929.16

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Solution

The fourth proportional to 16,711.72, 25,063.26 and 7,929.16 is: 11,891.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,711.72 : 25,063.26 = 7,929.16 : x
  2. Step 2: Convert to fraction form
    16,711.72/25,063.26 = 7,929.16/x
  3. Step 3: Cross multiply
    16,711.72x = 25,063.26 × 7,929.16
  4. Step 4: Simplify right side
    16,711.72x = 198,730,598.66
  5. Step 5: Solve for x
    x = 198,730,598.66/16,711.72
  6. Step 6: Final answer
    x = 11,891.69

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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.