Home / 20,839.64-28,759.74-11,408.60

Finding the Fourth Proportional to 20,839.64, 28,759.74 and 11,408.60

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Solution

The fourth proportional to 20,839.64, 28,759.74 and 11,408.60 is: 15,744.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.64 : 28,759.74 = 11,408.60 : x
  2. Step 2: Convert to fraction form
    20,839.64/28,759.74 = 11,408.60/x
  3. Step 3: Cross multiply
    20,839.64x = 28,759.74 × 11,408.60
  4. Step 4: Simplify right side
    20,839.64x = 328,108,369.76
  5. Step 5: Solve for x
    x = 328,108,369.76/20,839.64
  6. Step 6: Final answer
    x = 15,744.44

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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.