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Finding the Fourth Proportional to 7,791.36, 10,751.76 and 4,649.28

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Solution

The fourth proportional to 7,791.36, 10,751.76 and 4,649.28 is: 6,415.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.36 : 10,751.76 = 4,649.28 : x
  2. Step 2: Convert to fraction form
    7,791.36/10,751.76 = 4,649.28/x
  3. Step 3: Cross multiply
    7,791.36x = 10,751.76 × 4,649.28
  4. Step 4: Simplify right side
    7,791.36x = 49,987,942.73
  5. Step 5: Solve for x
    x = 49,987,942.73/7,791.36
  6. Step 6: Final answer
    x = 6,415.82

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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.