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Finding the Fourth Proportional to 28,696.65, 39,597.02 and 15,949.94

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Solution

The fourth proportional to 28,696.65, 39,597.02 and 15,949.94 is: 22,008.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,696.65 : 39,597.02 = 15,949.94 : x
  2. Step 2: Convert to fraction form
    28,696.65/39,597.02 = 15,949.94/x
  3. Step 3: Cross multiply
    28,696.65x = 39,597.02 × 15,949.94
  4. Step 4: Simplify right side
    28,696.65x = 631,569,815.44
  5. Step 5: Solve for x
    x = 631,569,815.44/28,696.65
  6. Step 6: Final answer
    x = 22,008.49

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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.