Home / 20,911.50-28,857.06-11,960.19

Finding the Fourth Proportional to 20,911.50, 28,857.06 and 11,960.19

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Solution

The fourth proportional to 20,911.50, 28,857.06 and 11,960.19 is: 16,504.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.50 : 28,857.06 = 11,960.19 : x
  2. Step 2: Convert to fraction form
    20,911.50/28,857.06 = 11,960.19/x
  3. Step 3: Cross multiply
    20,911.50x = 28,857.06 × 11,960.19
  4. Step 4: Simplify right side
    20,911.50x = 345,135,920.44
  5. Step 5: Solve for x
    x = 345,135,920.44/20,911.50
  6. Step 6: Final answer
    x = 16,504.60

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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.