Home / 7,908.47-11,861.33-2,978.15

Finding the Fourth Proportional to 7,908.47, 11,861.33 and 2,978.15

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Solution

The fourth proportional to 7,908.47, 11,861.33 and 2,978.15 is: 4,466.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.47 : 11,861.33 = 2,978.15 : x
  2. Step 2: Convert to fraction form
    7,908.47/11,861.33 = 2,978.15/x
  3. Step 3: Cross multiply
    7,908.47x = 11,861.33 × 2,978.15
  4. Step 4: Simplify right side
    7,908.47x = 35,324,745.74
  5. Step 5: Solve for x
    x = 35,324,745.74/7,908.47
  6. Step 6: Final answer
    x = 4,466.70

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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.