Home / 7,318.90-10,100.07-3,961.78

Finding the Fourth Proportional to 7,318.90, 10,100.07 and 3,961.78

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Solution

The fourth proportional to 7,318.90, 10,100.07 and 3,961.78 is: 5,467.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,318.90 : 10,100.07 = 3,961.78 : x
  2. Step 2: Convert to fraction form
    7,318.90/10,100.07 = 3,961.78/x
  3. Step 3: Cross multiply
    7,318.90x = 10,100.07 × 3,961.78
  4. Step 4: Simplify right side
    7,318.90x = 40,014,255.32
  5. Step 5: Solve for x
    x = 40,014,255.32/7,318.90
  6. Step 6: Final answer
    x = 5,467.25

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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.