Home / 20,996.36-28,965.84-12,608

Finding the Fourth Proportional to 20,996.36, 28,965.84 and 12,608

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Solution

The fourth proportional to 20,996.36, 28,965.84 and 12,608 is: 17,393.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.36 : 28,965.84 = 12,608 : x
  2. Step 2: Convert to fraction form
    20,996.36/28,965.84 = 12,608/x
  3. Step 3: Cross multiply
    20,996.36x = 28,965.84 × 12,608
  4. Step 4: Simplify right side
    20,996.36x = 365,201,310.72
  5. Step 5: Solve for x
    x = 365,201,310.72/20,996.36
  6. Step 6: Final answer
    x = 17,393.55

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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.