Home / 4,921-6,791.20-2,682.78

Finding the Fourth Proportional to 4,921, 6,791.20 and 2,682.78

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Solution

The fourth proportional to 4,921, 6,791.20 and 2,682.78 is: 3,702.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,921 : 6,791.20 = 2,682.78 : x
  2. Step 2: Convert to fraction form
    4,921/6,791.20 = 2,682.78/x
  3. Step 3: Cross multiply
    4,921x = 6,791.20 × 2,682.78
  4. Step 4: Simplify right side
    4,921x = 18,219,295.54
  5. Step 5: Solve for x
    x = 18,219,295.54/4,921
  6. Step 6: Final answer
    x = 3,702.36

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.