Home / 20,839.44-28,759.16-11,408

Finding the Fourth Proportional to 20,839.44, 28,759.16 and 11,408

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Solution

The fourth proportional to 20,839.44, 28,759.16 and 11,408 is: 15,743.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.44 : 28,759.16 = 11,408 : x
  2. Step 2: Convert to fraction form
    20,839.44/28,759.16 = 11,408/x
  3. Step 3: Cross multiply
    20,839.44x = 28,759.16 × 11,408
  4. Step 4: Simplify right side
    20,839.44x = 328,084,497.28
  5. Step 5: Solve for x
    x = 328,084,497.28/20,839.44
  6. Step 6: Final answer
    x = 15,743.44

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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.