Home / 20,917.21-28,863.96-11,963.28

Finding the Fourth Proportional to 20,917.21, 28,863.96 and 11,963.28

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Solution

The fourth proportional to 20,917.21, 28,863.96 and 11,963.28 is: 16,508.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.21 : 28,863.96 = 11,963.28 : x
  2. Step 2: Convert to fraction form
    20,917.21/28,863.96 = 11,963.28/x
  3. Step 3: Cross multiply
    20,917.21x = 28,863.96 × 11,963.28
  4. Step 4: Simplify right side
    20,917.21x = 345,307,635.39
  5. Step 5: Solve for x
    x = 345,307,635.39/20,917.21
  6. Step 6: Final answer
    x = 16,508.30

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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.