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Finding the Fourth Proportional to 13,481.65, 18,604.26 and 7,816.51

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Solution

The fourth proportional to 13,481.65, 18,604.26 and 7,816.51 is: 10,786.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,481.65 : 18,604.26 = 7,816.51 : x
  2. Step 2: Convert to fraction form
    13,481.65/18,604.26 = 7,816.51/x
  3. Step 3: Cross multiply
    13,481.65x = 18,604.26 × 7,816.51
  4. Step 4: Simplify right side
    13,481.65x = 145,420,384.33
  5. Step 5: Solve for x
    x = 145,420,384.33/13,481.65
  6. Step 6: Final answer
    x = 10,786.54

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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.