Home / 6,628-9,146.30-3,974.90

Finding the Fourth Proportional to 6,628, 9,146.30 and 3,974.90

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Solution

The fourth proportional to 6,628, 9,146.30 and 3,974.90 is: 5,485.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628 : 9,146.30 = 3,974.90 : x
  2. Step 2: Convert to fraction form
    6,628/9,146.30 = 3,974.90/x
  3. Step 3: Cross multiply
    6,628x = 9,146.30 × 3,974.90
  4. Step 4: Simplify right side
    6,628x = 36,355,627.87
  5. Step 5: Solve for x
    x = 36,355,627.87/6,628
  6. Step 6: Final answer
    x = 5,485.16

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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.