Home / 7,131.09-9,838.62-3,986.67

Finding the Fourth Proportional to 7,131.09, 9,838.62 and 3,986.67

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Solution

The fourth proportional to 7,131.09, 9,838.62 and 3,986.67 is: 5,500.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131.09 : 9,838.62 = 3,986.67 : x
  2. Step 2: Convert to fraction form
    7,131.09/9,838.62 = 3,986.67/x
  3. Step 3: Cross multiply
    7,131.09x = 9,838.62 × 3,986.67
  4. Step 4: Simplify right side
    7,131.09x = 39,223,331.20
  5. Step 5: Solve for x
    x = 39,223,331.20/7,131.09
  6. Step 6: Final answer
    x = 5,500.33

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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.