Home / 21,128.21-29,125.86-16,083.65

Finding the Fourth Proportional to 21,128.21, 29,125.86 and 16,083.65

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Solution

The fourth proportional to 21,128.21, 29,125.86 and 16,083.65 is: 22,171.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,128.21 : 29,125.86 = 16,083.65 : x
  2. Step 2: Convert to fraction form
    21,128.21/29,125.86 = 16,083.65/x
  3. Step 3: Cross multiply
    21,128.21x = 29,125.86 × 16,083.65
  4. Step 4: Simplify right side
    21,128.21x = 468,450,150.69
  5. Step 5: Solve for x
    x = 468,450,150.69/21,128.21
  6. Step 6: Final answer
    x = 22,171.78

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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.