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Finding the Fourth Proportional to 13,635.41, 18,812.05 and 8,922.42

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Solution

The fourth proportional to 13,635.41, 18,812.05 and 8,922.42 is: 12,309.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,635.41 : 18,812.05 = 8,922.42 : x
  2. Step 2: Convert to fraction form
    13,635.41/18,812.05 = 8,922.42/x
  3. Step 3: Cross multiply
    13,635.41x = 18,812.05 × 8,922.42
  4. Step 4: Simplify right side
    13,635.41x = 167,848,988.85
  5. Step 5: Solve for x
    x = 167,848,988.85/13,635.41
  6. Step 6: Final answer
    x = 12,309.79

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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.