Home / 6,921.66-10,382.36-1,991.32

Finding the Fourth Proportional to 6,921.66, 10,382.36 and 1,991.32

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Solution

The fourth proportional to 6,921.66, 10,382.36 and 1,991.32 is: 2,986.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.66 : 10,382.36 = 1,991.32 : x
  2. Step 2: Convert to fraction form
    6,921.66/10,382.36 = 1,991.32/x
  3. Step 3: Cross multiply
    6,921.66x = 10,382.36 × 1,991.32
  4. Step 4: Simplify right side
    6,921.66x = 20,674,601.12
  5. Step 5: Solve for x
    x = 20,674,601.12/6,921.66
  6. Step 6: Final answer
    x = 2,986.94

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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.