Home / 9,161.12-12,640.24-5,181.37

Finding the Fourth Proportional to 9,161.12, 12,640.24 and 5,181.37

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Solution

The fourth proportional to 9,161.12, 12,640.24 and 5,181.37 is: 7,149.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,161.12 : 12,640.24 = 5,181.37 : x
  2. Step 2: Convert to fraction form
    9,161.12/12,640.24 = 5,181.37/x
  3. Step 3: Cross multiply
    9,161.12x = 12,640.24 × 5,181.37
  4. Step 4: Simplify right side
    9,161.12x = 65,493,760.33
  5. Step 5: Solve for x
    x = 65,493,760.33/9,161.12
  6. Step 6: Final answer
    x = 7,149.10

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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.