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Finding the Fourth Proportional to 7,940.35, 11,908.08 and 5,490.91

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Solution

The fourth proportional to 7,940.35, 11,908.08 and 5,490.91 is: 8,234.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.35 : 11,908.08 = 5,490.91 : x
  2. Step 2: Convert to fraction form
    7,940.35/11,908.08 = 5,490.91/x
  3. Step 3: Cross multiply
    7,940.35x = 11,908.08 × 5,490.91
  4. Step 4: Simplify right side
    7,940.35x = 65,386,195.55
  5. Step 5: Solve for x
    x = 65,386,195.55/7,940.35
  6. Step 6: Final answer
    x = 8,234.67

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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.