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Finding the Fourth Proportional to 13,617.92, 18,789.44 and 7,949.42

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Solution

The fourth proportional to 13,617.92, 18,789.44 and 7,949.42 is: 10,968.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,617.92 : 18,789.44 = 7,949.42 : x
  2. Step 2: Convert to fraction form
    13,617.92/18,789.44 = 7,949.42/x
  3. Step 3: Cross multiply
    13,617.92x = 18,789.44 × 7,949.42
  4. Step 4: Simplify right side
    13,617.92x = 149,365,150.12
  5. Step 5: Solve for x
    x = 149,365,150.12/13,617.92
  6. Step 6: Final answer
    x = 10,968.28

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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.