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Finding the Fourth Proportional to 6,628.92, 9,939.87 and 3,993.99

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Solution

The fourth proportional to 6,628.92, 9,939.87 and 3,993.99 is: 5,988.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,628.92 : 9,939.87 = 3,993.99 : x
  2. Step 2: Convert to fraction form
    6,628.92/9,939.87 = 3,993.99/x
  3. Step 3: Cross multiply
    6,628.92x = 9,939.87 × 3,993.99
  4. Step 4: Simplify right side
    6,628.92x = 39,699,741.38
  5. Step 5: Solve for x
    x = 39,699,741.38/6,628.92
  6. Step 6: Final answer
    x = 5,988.87

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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.