Home / 7,981.03-11,971.23-4,290.43

Finding the Fourth Proportional to 7,981.03, 11,971.23 and 4,290.43

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Solution

The fourth proportional to 7,981.03, 11,971.23 and 4,290.43 is: 6,435.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.03 : 11,971.23 = 4,290.43 : x
  2. Step 2: Convert to fraction form
    7,981.03/11,971.23 = 4,290.43/x
  3. Step 3: Cross multiply
    7,981.03x = 11,971.23 × 4,290.43
  4. Step 4: Simplify right side
    7,981.03x = 51,361,724.33
  5. Step 5: Solve for x
    x = 51,361,724.33/7,981.03
  6. Step 6: Final answer
    x = 6,435.48

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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.