Home / 6,921.44-10,382.76-1,991.48

Finding the Fourth Proportional to 6,921.44, 10,382.76 and 1,991.48

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Solution

The fourth proportional to 6,921.44, 10,382.76 and 1,991.48 is: 2,987.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.44 : 10,382.76 = 1,991.48 : x
  2. Step 2: Convert to fraction form
    6,921.44/10,382.76 = 1,991.48/x
  3. Step 3: Cross multiply
    6,921.44x = 10,382.76 × 1,991.48
  4. Step 4: Simplify right side
    6,921.44x = 20,677,058.88
  5. Step 5: Solve for x
    x = 20,677,058.88/6,921.44
  6. Step 6: Final answer
    x = 2,987.39

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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.