Home / 6,921.53-10,382.23-1,991.15

Finding the Fourth Proportional to 6,921.53, 10,382.23 and 1,991.15

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Solution

The fourth proportional to 6,921.53, 10,382.23 and 1,991.15 is: 2,986.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.53 : 10,382.23 = 1,991.15 : x
  2. Step 2: Convert to fraction form
    6,921.53/10,382.23 = 1,991.15/x
  3. Step 3: Cross multiply
    6,921.53x = 10,382.23 × 1,991.15
  4. Step 4: Simplify right side
    6,921.53x = 20,672,577.26
  5. Step 5: Solve for x
    x = 20,672,577.26/6,921.53
  6. Step 6: Final answer
    x = 2,986.71

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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.