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Finding the Fourth Proportional to 15,769.44, 21,762.80 and 8,696.52

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Solution

The fourth proportional to 15,769.44, 21,762.80 and 8,696.52 is: 12,001.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,769.44 : 21,762.80 = 8,696.52 : x
  2. Step 2: Convert to fraction form
    15,769.44/21,762.80 = 8,696.52/x
  3. Step 3: Cross multiply
    15,769.44x = 21,762.80 × 8,696.52
  4. Step 4: Simplify right side
    15,769.44x = 189,260,625.46
  5. Step 5: Solve for x
    x = 189,260,625.46/15,769.44
  6. Step 6: Final answer
    x = 12,001.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.