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Finding the Fourth Proportional to 18,481.92, 25,512 and 12,544.32

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Solution

The fourth proportional to 18,481.92, 25,512 and 12,544.32 is: 17,315.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.92 : 25,512 = 12,544.32 : x
  2. Step 2: Convert to fraction form
    18,481.92/25,512 = 12,544.32/x
  3. Step 3: Cross multiply
    18,481.92x = 25,512 × 12,544.32
  4. Step 4: Simplify right side
    18,481.92x = 320,030,691.84
  5. Step 5: Solve for x
    x = 320,030,691.84/18,481.92
  6. Step 6: Final answer
    x = 17,315.88

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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.