Home / 21,529.31-29,709.39-11,969.84

Finding the Fourth Proportional to 21,529.31, 29,709.39 and 11,969.84

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Solution

The fourth proportional to 21,529.31, 29,709.39 and 11,969.84 is: 16,517.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,529.31 : 29,709.39 = 11,969.84 : x
  2. Step 2: Convert to fraction form
    21,529.31/29,709.39 = 11,969.84/x
  3. Step 3: Cross multiply
    21,529.31x = 29,709.39 × 11,969.84
  4. Step 4: Simplify right side
    21,529.31x = 355,616,644.80
  5. Step 5: Solve for x
    x = 355,616,644.80/21,529.31
  6. Step 6: Final answer
    x = 16,517.79

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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.