Home / 7,961.96-10,991.40-4,979.44

Finding the Fourth Proportional to 7,961.96, 10,991.40 and 4,979.44

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Solution

The fourth proportional to 7,961.96, 10,991.40 and 4,979.44 is: 6,874.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.96 : 10,991.40 = 4,979.44 : x
  2. Step 2: Convert to fraction form
    7,961.96/10,991.40 = 4,979.44/x
  3. Step 3: Cross multiply
    7,961.96x = 10,991.40 × 4,979.44
  4. Step 4: Simplify right side
    7,961.96x = 54,731,011.88
  5. Step 5: Solve for x
    x = 54,731,011.88/7,961.96
  6. Step 6: Final answer
    x = 6,874.06

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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.