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Finding the Fourth Proportional to 7,963.93, 10,953.69 and 6,388.57

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Solution

The fourth proportional to 7,963.93, 10,953.69 and 6,388.57 is: 8,786.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.93 : 10,953.69 = 6,388.57 : x
  2. Step 2: Convert to fraction form
    7,963.93/10,953.69 = 6,388.57/x
  3. Step 3: Cross multiply
    7,963.93x = 10,953.69 × 6,388.57
  4. Step 4: Simplify right side
    7,963.93x = 69,978,415.32
  5. Step 5: Solve for x
    x = 69,978,415.32/7,963.93
  6. Step 6: Final answer
    x = 8,786.92

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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.