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Finding the Fourth Proportional to 20,597.98, 28,425.36 and 11,166.55

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Solution

The fourth proportional to 20,597.98, 28,425.36 and 11,166.55 is: 15,409.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,597.98 : 28,425.36 = 11,166.55 : x
  2. Step 2: Convert to fraction form
    20,597.98/28,425.36 = 11,166.55/x
  3. Step 3: Cross multiply
    20,597.98x = 28,425.36 × 11,166.55
  4. Step 4: Simplify right side
    20,597.98x = 317,413,203.71
  5. Step 5: Solve for x
    x = 317,413,203.71/20,597.98
  6. Step 6: Final answer
    x = 15,409.92

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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.