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Finding the Fourth Proportional to 18,662.69, 25,743.20 and 11,945.94

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Solution

The fourth proportional to 18,662.69, 25,743.20 and 11,945.94 is: 16,478.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.69 : 25,743.20 = 11,945.94 : x
  2. Step 2: Convert to fraction form
    18,662.69/25,743.20 = 11,945.94/x
  3. Step 3: Cross multiply
    18,662.69x = 25,743.20 × 11,945.94
  4. Step 4: Simplify right side
    18,662.69x = 307,526,662.88
  5. Step 5: Solve for x
    x = 307,526,662.88/18,662.69
  6. Step 6: Final answer
    x = 16,478.16

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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.