Home / 6,977.89-9,629.47-3,993.78

Finding the Fourth Proportional to 6,977.89, 9,629.47 and 3,993.78

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Solution

The fourth proportional to 6,977.89, 9,629.47 and 3,993.78 is: 5,511.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,977.89 : 9,629.47 = 3,993.78 : x
  2. Step 2: Convert to fraction form
    6,977.89/9,629.47 = 3,993.78/x
  3. Step 3: Cross multiply
    6,977.89x = 9,629.47 × 3,993.78
  4. Step 4: Simplify right side
    6,977.89x = 38,457,964.73
  5. Step 5: Solve for x
    x = 38,457,964.73/6,977.89
  6. Step 6: Final answer
    x = 5,511.41

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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.