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Finding the Fourth Proportional to 15,993.96, 22,072.14 and 8,919.96

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Solution

The fourth proportional to 15,993.96, 22,072.14 and 8,919.96 is: 12,309.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,993.96 : 22,072.14 = 8,919.96 : x
  2. Step 2: Convert to fraction form
    15,993.96/22,072.14 = 8,919.96/x
  3. Step 3: Cross multiply
    15,993.96x = 22,072.14 × 8,919.96
  4. Step 4: Simplify right side
    15,993.96x = 196,882,605.91
  5. Step 5: Solve for x
    x = 196,882,605.91/15,993.96
  6. Step 6: Final answer
    x = 12,309.81

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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.