Home / 11,880.80-16,396.32-6,912.80

Finding the Fourth Proportional to 11,880.80, 16,396.32 and 6,912.80

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Solution

The fourth proportional to 11,880.80, 16,396.32 and 6,912.80 is: 9,540.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,880.80 : 16,396.32 = 6,912.80 : x
  2. Step 2: Convert to fraction form
    11,880.80/16,396.32 = 6,912.80/x
  3. Step 3: Cross multiply
    11,880.80x = 16,396.32 × 6,912.80
  4. Step 4: Simplify right side
    11,880.80x = 113,344,480.90
  5. Step 5: Solve for x
    x = 113,344,480.90/11,880.80
  6. Step 6: Final answer
    x = 9,540.14

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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.