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Finding the Fourth Proportional to 18,716.92, 25,832.16 and 11,645.60

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Solution

The fourth proportional to 18,716.92, 25,832.16 and 11,645.60 is: 16,072.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,716.92 : 25,832.16 = 11,645.60 : x
  2. Step 2: Convert to fraction form
    18,716.92/25,832.16 = 11,645.60/x
  3. Step 3: Cross multiply
    18,716.92x = 25,832.16 × 11,645.60
  4. Step 4: Simplify right side
    18,716.92x = 300,831,002.50
  5. Step 5: Solve for x
    x = 300,831,002.50/18,716.92
  6. Step 6: Final answer
    x = 16,072.68

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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.