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Finding the Fourth Proportional to 9,213.88, 12,717.88 and 7,968.32

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Solution

The fourth proportional to 9,213.88, 12,717.88 and 7,968.32 is: 10,998.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,213.88 : 12,717.88 = 7,968.32 : x
  2. Step 2: Convert to fraction form
    9,213.88/12,717.88 = 7,968.32/x
  3. Step 3: Cross multiply
    9,213.88x = 12,717.88 × 7,968.32
  4. Step 4: Simplify right side
    9,213.88x = 101,340,137.56
  5. Step 5: Solve for x
    x = 101,340,137.56/9,213.88
  6. Step 6: Final answer
    x = 10,998.64

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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.