Home / 21,076.22-29,084.84-11,515.90

Finding the Fourth Proportional to 21,076.22, 29,084.84 and 11,515.90

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Solution

The fourth proportional to 21,076.22, 29,084.84 and 11,515.90 is: 15,891.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.22 : 29,084.84 = 11,515.90 : x
  2. Step 2: Convert to fraction form
    21,076.22/29,084.84 = 11,515.90/x
  3. Step 3: Cross multiply
    21,076.22x = 29,084.84 × 11,515.90
  4. Step 4: Simplify right side
    21,076.22x = 334,938,108.96
  5. Step 5: Solve for x
    x = 334,938,108.96/21,076.22
  6. Step 6: Final answer
    x = 15,891.75

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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.