Home / 20,880.94-28,815.66-11,450.12

Finding the Fourth Proportional to 20,880.94, 28,815.66 and 11,450.12

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Solution

The fourth proportional to 20,880.94, 28,815.66 and 11,450.12 is: 15,801.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.94 : 28,815.66 = 11,450.12 : x
  2. Step 2: Convert to fraction form
    20,880.94/28,815.66 = 11,450.12/x
  3. Step 3: Cross multiply
    20,880.94x = 28,815.66 × 11,450.12
  4. Step 4: Simplify right side
    20,880.94x = 329,942,764.88
  5. Step 5: Solve for x
    x = 329,942,764.88/20,880.94
  6. Step 6: Final answer
    x = 15,801.15

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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.