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Finding the Fourth Proportional to 6,393.95, 9,578.64 and 3,921.56

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Solution

The fourth proportional to 6,393.95, 9,578.64 and 3,921.56 is: 5,874.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,393.95 : 9,578.64 = 3,921.56 : x
  2. Step 2: Convert to fraction form
    6,393.95/9,578.64 = 3,921.56/x
  3. Step 3: Cross multiply
    6,393.95x = 9,578.64 × 3,921.56
  4. Step 4: Simplify right side
    6,393.95x = 37,563,211.48
  5. Step 5: Solve for x
    x = 37,563,211.48/6,393.95
  6. Step 6: Final answer
    x = 5,874.81

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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.