Home / 7,964.78-10,991.53-4,379.90

Finding the Fourth Proportional to 7,964.78, 10,991.53 and 4,379.90

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Solution

The fourth proportional to 7,964.78, 10,991.53 and 4,379.90 is: 6,044.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,964.78 : 10,991.53 = 4,379.90 : x
  2. Step 2: Convert to fraction form
    7,964.78/10,991.53 = 4,379.90/x
  3. Step 3: Cross multiply
    7,964.78x = 10,991.53 × 4,379.90
  4. Step 4: Simplify right side
    7,964.78x = 48,141,736.34
  5. Step 5: Solve for x
    x = 48,141,736.34/7,964.78
  6. Step 6: Final answer
    x = 6,044.33

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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.