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Finding the Fourth Proportional to 21,596.72, 32,375.64 and 7,742.48

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Solution

The fourth proportional to 21,596.72, 32,375.64 and 7,742.48 is: 11,606.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,596.72 : 32,375.64 = 7,742.48 : x
  2. Step 2: Convert to fraction form
    21,596.72/32,375.64 = 7,742.48/x
  3. Step 3: Cross multiply
    21,596.72x = 32,375.64 × 7,742.48
  4. Step 4: Simplify right side
    21,596.72x = 250,667,745.19
  5. Step 5: Solve for x
    x = 250,667,745.19/21,596.72
  6. Step 6: Final answer
    x = 11,606.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.