Home / 6,621.74-9,138.78-3,970.61

Finding the Fourth Proportional to 6,621.74, 9,138.78 and 3,970.61

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Solution

The fourth proportional to 6,621.74, 9,138.78 and 3,970.61 is: 5,479.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.74 : 9,138.78 = 3,970.61 : x
  2. Step 2: Convert to fraction form
    6,621.74/9,138.78 = 3,970.61/x
  3. Step 3: Cross multiply
    6,621.74x = 9,138.78 × 3,970.61
  4. Step 4: Simplify right side
    6,621.74x = 36,286,485.56
  5. Step 5: Solve for x
    x = 36,286,485.56/6,621.74
  6. Step 6: Final answer
    x = 5,479.91

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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.