Home / 21,940.85-30,278.34-11,869.26

Finding the Fourth Proportional to 21,940.85, 30,278.34 and 11,869.26

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Solution

The fourth proportional to 21,940.85, 30,278.34 and 11,869.26 is: 16,379.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,940.85 : 30,278.34 = 11,869.26 : x
  2. Step 2: Convert to fraction form
    21,940.85/30,278.34 = 11,869.26/x
  3. Step 3: Cross multiply
    21,940.85x = 30,278.34 × 11,869.26
  4. Step 4: Simplify right side
    21,940.85x = 359,381,489.83
  5. Step 5: Solve for x
    x = 359,381,489.83/21,940.85
  6. Step 6: Final answer
    x = 16,379.56

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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.