Home / 20,917.62-28,862.64-11,963.88

Finding the Fourth Proportional to 20,917.62, 28,862.64 and 11,963.88

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Solution

The fourth proportional to 20,917.62, 28,862.64 and 11,963.88 is: 16,508.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.62 : 28,862.64 = 11,963.88 : x
  2. Step 2: Convert to fraction form
    20,917.62/28,862.64 = 11,963.88/x
  3. Step 3: Cross multiply
    20,917.62x = 28,862.64 × 11,963.88
  4. Step 4: Simplify right side
    20,917.62x = 345,309,161.44
  5. Step 5: Solve for x
    x = 345,309,161.44/20,917.62
  6. Step 6: Final answer
    x = 16,508.05

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1.5x scale

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.