Home / 21,343.14-29,453.85-11,912.42

Finding the Fourth Proportional to 21,343.14, 29,453.85 and 11,912.42

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Solution

The fourth proportional to 21,343.14, 29,453.85 and 11,912.42 is: 16,439.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,343.14 : 29,453.85 = 11,912.42 : x
  2. Step 2: Convert to fraction form
    21,343.14/29,453.85 = 11,912.42/x
  3. Step 3: Cross multiply
    21,343.14x = 29,453.85 × 11,912.42
  4. Step 4: Simplify right side
    21,343.14x = 350,866,631.82
  5. Step 5: Solve for x
    x = 350,866,631.82/21,343.14
  6. Step 6: Final answer
    x = 16,439.32

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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.