Home / 7,185.26-10,778.07-1,991.18

Finding the Fourth Proportional to 7,185.26, 10,778.07 and 1,991.18

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Solution

The fourth proportional to 7,185.26, 10,778.07 and 1,991.18 is: 2,986.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.26 : 10,778.07 = 1,991.18 : x
  2. Step 2: Convert to fraction form
    7,185.26/10,778.07 = 1,991.18/x
  3. Step 3: Cross multiply
    7,185.26x = 10,778.07 × 1,991.18
  4. Step 4: Simplify right side
    7,185.26x = 21,461,023.53
  5. Step 5: Solve for x
    x = 21,461,023.53/7,185.26
  6. Step 6: Final answer
    x = 2,986.81

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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.