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Finding the Fourth Proportional to 13,621.81, 18,797.24 and 7,958.17

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Solution

The fourth proportional to 13,621.81, 18,797.24 and 7,958.17 is: 10,981.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.81 : 18,797.24 = 7,958.17 : x
  2. Step 2: Convert to fraction form
    13,621.81/18,797.24 = 7,958.17/x
  3. Step 3: Cross multiply
    13,621.81x = 18,797.24 × 7,958.17
  4. Step 4: Simplify right side
    13,621.81x = 149,591,546.73
  5. Step 5: Solve for x
    x = 149,591,546.73/13,621.81
  6. Step 6: Final answer
    x = 10,981.77

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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.