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Finding the Fourth Proportional to 6,940.99, 9,576.78 and 3,916.55

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Solution

The fourth proportional to 6,940.99, 9,576.78 and 3,916.55 is: 5,403.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,940.99 : 9,576.78 = 3,916.55 : x
  2. Step 2: Convert to fraction form
    6,940.99/9,576.78 = 3,916.55/x
  3. Step 3: Cross multiply
    6,940.99x = 9,576.78 × 3,916.55
  4. Step 4: Simplify right side
    6,940.99x = 37,507,968.99
  5. Step 5: Solve for x
    x = 37,507,968.99/6,940.99
  6. Step 6: Final answer
    x = 5,403.83

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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.