Home / 21,940.89-30,278.46-11,869.29

Finding the Fourth Proportional to 21,940.89, 30,278.46 and 11,869.29

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Solution

The fourth proportional to 21,940.89, 30,278.46 and 11,869.29 is: 16,379.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.89 : 30,278.46 = 11,869.29 : x
  2. Step 2: Convert to fraction form
    21,940.89/30,278.46 = 11,869.29/x
  3. Step 3: Cross multiply
    21,940.89x = 30,278.46 × 11,869.29
  4. Step 4: Simplify right side
    21,940.89x = 359,383,822.49
  5. Step 5: Solve for x
    x = 359,383,822.49/21,940.89
  6. Step 6: Final answer
    x = 16,379.64

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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.