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Finding the Fourth Proportional to 18,668.34, 27,960.54 and 8,786.76

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Solution

The fourth proportional to 18,668.34, 27,960.54 and 8,786.76 is: 13,160.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,668.34 : 27,960.54 = 8,786.76 : x
  2. Step 2: Convert to fraction form
    18,668.34/27,960.54 = 8,786.76/x
  3. Step 3: Cross multiply
    18,668.34x = 27,960.54 × 8,786.76
  4. Step 4: Simplify right side
    18,668.34x = 245,682,554.45
  5. Step 5: Solve for x
    x = 245,682,554.45/18,668.34
  6. Step 6: Final answer
    x = 13,160.39

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1.5x scale

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.