Home / 7,880.39-11,820.92-2,615.87

Finding the Fourth Proportional to 7,880.39, 11,820.92 and 2,615.87

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Solution

The fourth proportional to 7,880.39, 11,820.92 and 2,615.87 is: 3,923.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.39 : 11,820.92 = 2,615.87 : x
  2. Step 2: Convert to fraction form
    7,880.39/11,820.92 = 2,615.87/x
  3. Step 3: Cross multiply
    7,880.39x = 11,820.92 × 2,615.87
  4. Step 4: Simplify right side
    7,880.39x = 30,921,976.92
  5. Step 5: Solve for x
    x = 30,921,976.92/7,880.39
  6. Step 6: Final answer
    x = 3,923.91

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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.