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Finding the Fourth Proportional to 4,920.64, 6,791.04 and 2,796.64

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Solution

The fourth proportional to 4,920.64, 6,791.04 and 2,796.64 is: 3,859.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.64 : 6,791.04 = 2,796.64 : x
  2. Step 2: Convert to fraction form
    4,920.64/6,791.04 = 2,796.64/x
  3. Step 3: Cross multiply
    4,920.64x = 6,791.04 × 2,796.64
  4. Step 4: Simplify right side
    4,920.64x = 18,992,094.11
  5. Step 5: Solve for x
    x = 18,992,094.11/4,920.64
  6. Step 6: Final answer
    x = 3,859.68

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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.