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Finding the Fourth Proportional to 6,664.70, 9,990.65 and 5,183.10

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Solution

The fourth proportional to 6,664.70, 9,990.65 and 5,183.10 is: 7,769.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,664.70 : 9,990.65 = 5,183.10 : x
  2. Step 2: Convert to fraction form
    6,664.70/9,990.65 = 5,183.10/x
  3. Step 3: Cross multiply
    6,664.70x = 9,990.65 × 5,183.10
  4. Step 4: Simplify right side
    6,664.70x = 51,782,538.02
  5. Step 5: Solve for x
    x = 51,782,538.02/6,664.70
  6. Step 6: Final answer
    x = 7,769.67

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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.