Home / 21,076.58-29,083.04-13,121.36

Finding the Fourth Proportional to 21,076.58, 29,083.04 and 13,121.36

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Solution

The fourth proportional to 21,076.58, 29,083.04 and 13,121.36 is: 18,105.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.58 : 29,083.04 = 13,121.36 : x
  2. Step 2: Convert to fraction form
    21,076.58/29,083.04 = 13,121.36/x
  3. Step 3: Cross multiply
    21,076.58x = 29,083.04 × 13,121.36
  4. Step 4: Simplify right side
    21,076.58x = 381,609,037.73
  5. Step 5: Solve for x
    x = 381,609,037.73/21,076.58
  6. Step 6: Final answer
    x = 18,105.83

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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.