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Finding the Fourth Proportional to 20,795.22, 28,698.57 and 13,716.63

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Solution

The fourth proportional to 20,795.22, 28,698.57 and 13,716.63 is: 18,929.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.22 : 28,698.57 = 13,716.63 : x
  2. Step 2: Convert to fraction form
    20,795.22/28,698.57 = 13,716.63/x
  3. Step 3: Cross multiply
    20,795.22x = 28,698.57 × 13,716.63
  4. Step 4: Simplify right side
    20,795.22x = 393,647,666.22
  5. Step 5: Solve for x
    x = 393,647,666.22/20,795.22
  6. Step 6: Final answer
    x = 18,929.72

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