Home / 7,915.80-11,876.45-2,986.86

Finding the Fourth Proportional to 7,915.80, 11,876.45 and 2,986.86

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Solution

The fourth proportional to 7,915.80, 11,876.45 and 2,986.86 is: 4,481.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.80 : 11,876.45 = 2,986.86 : x
  2. Step 2: Convert to fraction form
    7,915.80/11,876.45 = 2,986.86/x
  3. Step 3: Cross multiply
    7,915.80x = 11,876.45 × 2,986.86
  4. Step 4: Simplify right side
    7,915.80x = 35,473,293.45
  5. Step 5: Solve for x
    x = 35,473,293.45/7,915.80
  6. Step 6: Final answer
    x = 4,481.33

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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.