Home / 6,631.92-9,945.72-3,121.38

Finding the Fourth Proportional to 6,631.92, 9,945.72 and 3,121.38

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Solution

The fourth proportional to 6,631.92, 9,945.72 and 3,121.38 is: 4,681.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,631.92 : 9,945.72 = 3,121.38 : x
  2. Step 2: Convert to fraction form
    6,631.92/9,945.72 = 3,121.38/x
  3. Step 3: Cross multiply
    6,631.92x = 9,945.72 × 3,121.38
  4. Step 4: Simplify right side
    6,631.92x = 31,044,371.49
  5. Step 5: Solve for x
    x = 31,044,371.49/6,631.92
  6. Step 6: Final answer
    x = 4,681.05

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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.