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Finding the Fourth Proportional to 18,556.50, 27,765 and 13,020.65

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Solution

The fourth proportional to 18,556.50, 27,765 and 13,020.65 is: 19,482.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,556.50 : 27,765 = 13,020.65 : x
  2. Step 2: Convert to fraction form
    18,556.50/27,765 = 13,020.65/x
  3. Step 3: Cross multiply
    18,556.50x = 27,765 × 13,020.65
  4. Step 4: Simplify right side
    18,556.50x = 361,518,208.43
  5. Step 5: Solve for x
    x = 361,518,208.43/18,556.50
  6. Step 6: Final answer
    x = 19,482.03

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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.