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Finding the Fourth Proportional to 18,693.81, 25,796.75 and 10,310.31

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Solution

The fourth proportional to 18,693.81, 25,796.75 and 10,310.31 is: 14,227.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693.81 : 25,796.75 = 10,310.31 : x
  2. Step 2: Convert to fraction form
    18,693.81/25,796.75 = 10,310.31/x
  3. Step 3: Cross multiply
    18,693.81x = 25,796.75 × 10,310.31
  4. Step 4: Simplify right side
    18,693.81x = 265,972,437.94
  5. Step 5: Solve for x
    x = 265,972,437.94/18,693.81
  6. Step 6: Final answer
    x = 14,227.83

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1.5x scale

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.