Home / 7,131.24-9,842.36-3,986.84

Finding the Fourth Proportional to 7,131.24, 9,842.36 and 3,986.84

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Solution

The fourth proportional to 7,131.24, 9,842.36 and 3,986.84 is: 5,502.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.24 : 9,842.36 = 3,986.84 : x
  2. Step 2: Convert to fraction form
    7,131.24/9,842.36 = 3,986.84/x
  3. Step 3: Cross multiply
    7,131.24x = 9,842.36 × 3,986.84
  4. Step 4: Simplify right side
    7,131.24x = 39,239,914.54
  5. Step 5: Solve for x
    x = 39,239,914.54/7,131.24
  6. Step 6: Final answer
    x = 5,502.54

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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.