Home / 20,917.89-28,867.37-11,965.41

Finding the Fourth Proportional to 20,917.89, 28,867.37 and 11,965.41

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Solution

The fourth proportional to 20,917.89, 28,867.37 and 11,965.41 is: 16,512.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.89 : 28,867.37 = 11,965.41 : x
  2. Step 2: Convert to fraction form
    20,917.89/28,867.37 = 11,965.41/x
  3. Step 3: Cross multiply
    20,917.89x = 28,867.37 × 11,965.41
  4. Step 4: Simplify right side
    20,917.89x = 345,409,857.84
  5. Step 5: Solve for x
    x = 345,409,857.84/20,917.89
  6. Step 6: Final answer
    x = 16,512.65

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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.