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Finding the Fourth Proportional to 18,608.96, 25,676.74 and 11,889.42

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Solution

The fourth proportional to 18,608.96, 25,676.74 and 11,889.42 is: 16,405.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.96 : 25,676.74 = 11,889.42 : x
  2. Step 2: Convert to fraction form
    18,608.96/25,676.74 = 11,889.42/x
  3. Step 3: Cross multiply
    18,608.96x = 25,676.74 × 11,889.42
  4. Step 4: Simplify right side
    18,608.96x = 305,281,546.09
  5. Step 5: Solve for x
    x = 305,281,546.09/18,608.96
  6. Step 6: Final answer
    x = 16,405.08

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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.