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Finding the Fourth Proportional to 12,891.69, 19,334.43 and 8,204.67

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Solution

The fourth proportional to 12,891.69, 19,334.43 and 8,204.67 is: 12,305.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,891.69 : 19,334.43 = 8,204.67 : x
  2. Step 2: Convert to fraction form
    12,891.69/19,334.43 = 8,204.67/x
  3. Step 3: Cross multiply
    12,891.69x = 19,334.43 × 8,204.67
  4. Step 4: Simplify right side
    12,891.69x = 158,632,617.79
  5. Step 5: Solve for x
    x = 158,632,617.79/12,891.69
  6. Step 6: Final answer
    x = 12,305.03

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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.