Home / 21,343.39-29,452.68-11,912.56

Finding the Fourth Proportional to 21,343.39, 29,452.68 and 11,912.56

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Solution

The fourth proportional to 21,343.39, 29,452.68 and 11,912.56 is: 16,438.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.39 : 29,452.68 = 11,912.56 : x
  2. Step 2: Convert to fraction form
    21,343.39/29,452.68 = 11,912.56/x
  3. Step 3: Cross multiply
    21,343.39x = 29,452.68 × 11,912.56
  4. Step 4: Simplify right side
    21,343.39x = 350,856,817.66
  5. Step 5: Solve for x
    x = 350,856,817.66/21,343.39
  6. Step 6: Final answer
    x = 16,438.66

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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.