Home / 7,181.10-10,771.89-1,986.54

Finding the Fourth Proportional to 7,181.10, 10,771.89 and 1,986.54

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Solution

The fourth proportional to 7,181.10, 10,771.89 and 1,986.54 is: 2,979.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,181.10 : 10,771.89 = 1,986.54 : x
  2. Step 2: Convert to fraction form
    7,181.10/10,771.89 = 1,986.54/x
  3. Step 3: Cross multiply
    7,181.10x = 10,771.89 × 1,986.54
  4. Step 4: Simplify right side
    7,181.10x = 21,398,790.36
  5. Step 5: Solve for x
    x = 21,398,790.36/7,181.10
  6. Step 6: Final answer
    x = 2,979.88

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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.