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Finding the Fourth Proportional to 12,623.63, 17,420.67 and 7,246.31

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Solution

The fourth proportional to 12,623.63, 17,420.67 and 7,246.31 is: 9,999.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,623.63 : 17,420.67 = 7,246.31 : x
  2. Step 2: Convert to fraction form
    12,623.63/17,420.67 = 7,246.31/x
  3. Step 3: Cross multiply
    12,623.63x = 17,420.67 × 7,246.31
  4. Step 4: Simplify right side
    12,623.63x = 126,235,488.12
  5. Step 5: Solve for x
    x = 126,235,488.12/12,623.63
  6. Step 6: Final answer
    x = 9,999.94

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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.