Home / 20,922.19-28,872.78-11,969.14

Finding the Fourth Proportional to 20,922.19, 28,872.78 and 11,969.14

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Solution

The fourth proportional to 20,922.19, 28,872.78 and 11,969.14 is: 16,517.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.19 : 28,872.78 = 11,969.14 : x
  2. Step 2: Convert to fraction form
    20,922.19/28,872.78 = 11,969.14/x
  3. Step 3: Cross multiply
    20,922.19x = 28,872.78 × 11,969.14
  4. Step 4: Simplify right side
    20,922.19x = 345,582,141.80
  5. Step 5: Solve for x
    x = 345,582,141.80/20,922.19
  6. Step 6: Final answer
    x = 16,517.50

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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.