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Finding the Fourth Proportional to 7,186, 9,912.34 and 5,057.80

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Solution

The fourth proportional to 7,186, 9,912.34 and 5,057.80 is: 6,976.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,186 : 9,912.34 = 5,057.80 : x
  2. Step 2: Convert to fraction form
    7,186/9,912.34 = 5,057.80/x
  3. Step 3: Cross multiply
    7,186x = 9,912.34 × 5,057.80
  4. Step 4: Simplify right side
    7,186x = 50,134,633.25
  5. Step 5: Solve for x
    x = 50,134,633.25/7,186
  6. Step 6: Final answer
    x = 6,976.71

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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.