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Finding the Fourth Proportional to 8,392.88, 12,578.55 and 7,091.96

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Solution

The fourth proportional to 8,392.88, 12,578.55 and 7,091.96 is: 10,628.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,392.88 : 12,578.55 = 7,091.96 : x
  2. Step 2: Convert to fraction form
    8,392.88/12,578.55 = 7,091.96/x
  3. Step 3: Cross multiply
    8,392.88x = 12,578.55 × 7,091.96
  4. Step 4: Simplify right side
    8,392.88x = 89,206,573.46
  5. Step 5: Solve for x
    x = 89,206,573.46/8,392.88
  6. Step 6: Final answer
    x = 10,628.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.