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Finding the Fourth Proportional to 18,481.81, 25,504.89 and 9,983.94

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Solution

The fourth proportional to 18,481.81, 25,504.89 and 9,983.94 is: 13,777.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.81 : 25,504.89 = 9,983.94 : x
  2. Step 2: Convert to fraction form
    18,481.81/25,504.89 = 9,983.94/x
  3. Step 3: Cross multiply
    18,481.81x = 25,504.89 × 9,983.94
  4. Step 4: Simplify right side
    18,481.81x = 254,639,291.47
  5. Step 5: Solve for x
    x = 254,639,291.47/18,481.81
  6. Step 6: Final answer
    x = 13,777.83

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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.