Home / 7,186.47-9,917.25-3,999.75

Finding the Fourth Proportional to 7,186.47, 9,917.25 and 3,999.75

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Solution

The fourth proportional to 7,186.47, 9,917.25 and 3,999.75 is: 5,519.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,186.47 : 9,917.25 = 3,999.75 : x
  2. Step 2: Convert to fraction form
    7,186.47/9,917.25 = 3,999.75/x
  3. Step 3: Cross multiply
    7,186.47x = 9,917.25 × 3,999.75
  4. Step 4: Simplify right side
    7,186.47x = 39,666,520.69
  5. Step 5: Solve for x
    x = 39,666,520.69/7,186.47
  6. Step 6: Final answer
    x = 5,519.61

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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.