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Finding the Fourth Proportional to 6,918.87, 10,388.64 and 3,960.64

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Solution

The fourth proportional to 6,918.87, 10,388.64 and 3,960.64 is: 5,946.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918.87 : 10,388.64 = 3,960.64 : x
  2. Step 2: Convert to fraction form
    6,918.87/10,388.64 = 3,960.64/x
  3. Step 3: Cross multiply
    6,918.87x = 10,388.64 × 3,960.64
  4. Step 4: Simplify right side
    6,918.87x = 41,145,663.13
  5. Step 5: Solve for x
    x = 41,145,663.13/6,918.87
  6. Step 6: Final answer
    x = 5,946.88

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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.