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Finding the Fourth Proportional to 7,163.76, 9,890.32 and 4,684.08

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Solution

The fourth proportional to 7,163.76, 9,890.32 and 4,684.08 is: 6,466.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,163.76 : 9,890.32 = 4,684.08 : x
  2. Step 2: Convert to fraction form
    7,163.76/9,890.32 = 4,684.08/x
  3. Step 3: Cross multiply
    7,163.76x = 9,890.32 × 4,684.08
  4. Step 4: Simplify right side
    7,163.76x = 46,327,050.11
  5. Step 5: Solve for x
    x = 46,327,050.11/7,163.76
  6. Step 6: Final answer
    x = 6,466.86

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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.