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Finding the Fourth Proportional to 10,932.90, 16,362.90 and 9,620.70

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Solution

The fourth proportional to 10,932.90, 16,362.90 and 9,620.70 is: 14,398.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,932.90 : 16,362.90 = 9,620.70 : x
  2. Step 2: Convert to fraction form
    10,932.90/16,362.90 = 9,620.70/x
  3. Step 3: Cross multiply
    10,932.90x = 16,362.90 × 9,620.70
  4. Step 4: Simplify right side
    10,932.90x = 157,422,552.03
  5. Step 5: Solve for x
    x = 157,422,552.03/10,932.90
  6. Step 6: Final answer
    x = 14,398.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.