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Finding the Fourth Proportional to 21,850.72, 30,145.44 and 13,452.64

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Solution

The fourth proportional to 21,850.72, 30,145.44 and 13,452.64 is: 18,559.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,850.72 : 30,145.44 = 13,452.64 : x
  2. Step 2: Convert to fraction form
    21,850.72/30,145.44 = 13,452.64/x
  3. Step 3: Cross multiply
    21,850.72x = 30,145.44 × 13,452.64
  4. Step 4: Simplify right side
    21,850.72x = 405,535,751.96
  5. Step 5: Solve for x
    x = 405,535,751.96/21,850.72
  6. Step 6: Final answer
    x = 18,559.38

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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.