Home / 21,489.30-29,653.75-11,928.44

Finding the Fourth Proportional to 21,489.30, 29,653.75 and 11,928.44

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Solution

The fourth proportional to 21,489.30, 29,653.75 and 11,928.44 is: 16,460.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,489.30 : 29,653.75 = 11,928.44 : x
  2. Step 2: Convert to fraction form
    21,489.30/29,653.75 = 11,928.44/x
  3. Step 3: Cross multiply
    21,489.30x = 29,653.75 × 11,928.44
  4. Step 4: Simplify right side
    21,489.30x = 353,722,799.56
  5. Step 5: Solve for x
    x = 353,722,799.56/21,489.30
  6. Step 6: Final answer
    x = 16,460.42

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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.