Home / 20,912.04-28,860.91-11,960.38

Finding the Fourth Proportional to 20,912.04, 28,860.91 and 11,960.38

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Solution

The fourth proportional to 20,912.04, 28,860.91 and 11,960.38 is: 16,506.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.04 : 28,860.91 = 11,960.38 : x
  2. Step 2: Convert to fraction form
    20,912.04/28,860.91 = 11,960.38/x
  3. Step 3: Cross multiply
    20,912.04x = 28,860.91 × 11,960.38
  4. Step 4: Simplify right side
    20,912.04x = 345,187,450.75
  5. Step 5: Solve for x
    x = 345,187,450.75/20,912.04
  6. Step 6: Final answer
    x = 16,506.64

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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.