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Finding the Fourth Proportional to 6,940.12, 10,392.88 and 5,078.20

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Solution

The fourth proportional to 6,940.12, 10,392.88 and 5,078.20 is: 7,604.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,940.12 : 10,392.88 = 5,078.20 : x
  2. Step 2: Convert to fraction form
    6,940.12/10,392.88 = 5,078.20/x
  3. Step 3: Cross multiply
    6,940.12x = 10,392.88 × 5,078.20
  4. Step 4: Simplify right side
    6,940.12x = 52,777,123.22
  5. Step 5: Solve for x
    x = 52,777,123.22/6,940.12
  6. Step 6: Final answer
    x = 7,604.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.