Home / 7,963.76-11,945.85-2,120.38

Finding the Fourth Proportional to 7,963.76, 11,945.85 and 2,120.38

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Solution

The fourth proportional to 7,963.76, 11,945.85 and 2,120.38 is: 3,180.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.76 : 11,945.85 = 2,120.38 : x
  2. Step 2: Convert to fraction form
    7,963.76/11,945.85 = 2,120.38/x
  3. Step 3: Cross multiply
    7,963.76x = 11,945.85 × 2,120.38
  4. Step 4: Simplify right side
    7,963.76x = 25,329,741.42
  5. Step 5: Solve for x
    x = 25,329,741.42/7,963.76
  6. Step 6: Final answer
    x = 3,180.63

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1.5x scale

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.