Home / 7,963.90-11,945.87-2,120.51

Finding the Fourth Proportional to 7,963.90, 11,945.87 and 2,120.51

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Solution

The fourth proportional to 7,963.90, 11,945.87 and 2,120.51 is: 3,180.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.90 : 11,945.87 = 2,120.51 : x
  2. Step 2: Convert to fraction form
    7,963.90/11,945.87 = 2,120.51/x
  3. Step 3: Cross multiply
    7,963.90x = 11,945.87 × 2,120.51
  4. Step 4: Simplify right side
    7,963.90x = 25,331,336.79
  5. Step 5: Solve for x
    x = 25,331,336.79/7,963.90
  6. Step 6: Final answer
    x = 3,180.77

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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.