Home / 6,621.78-9,137.70-3,789.21

Finding the Fourth Proportional to 6,621.78, 9,137.70 and 3,789.21

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Solution

The fourth proportional to 6,621.78, 9,137.70 and 3,789.21 is: 5,228.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,621.78 : 9,137.70 = 3,789.21 : x
  2. Step 2: Convert to fraction form
    6,621.78/9,137.70 = 3,789.21/x
  3. Step 3: Cross multiply
    6,621.78x = 9,137.70 × 3,789.21
  4. Step 4: Simplify right side
    6,621.78x = 34,624,664.22
  5. Step 5: Solve for x
    x = 34,624,664.22/6,621.78
  6. Step 6: Final answer
    x = 5,228.91

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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.