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Finding the Fourth Proportional to 18,667.29, 27,993.65 and 8,271.75

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Solution

The fourth proportional to 18,667.29, 27,993.65 and 8,271.75 is: 12,404.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,667.29 : 27,993.65 = 8,271.75 : x
  2. Step 2: Convert to fraction form
    18,667.29/27,993.65 = 8,271.75/x
  3. Step 3: Cross multiply
    18,667.29x = 27,993.65 × 8,271.75
  4. Step 4: Simplify right side
    18,667.29x = 231,556,433.03
  5. Step 5: Solve for x
    x = 231,556,433.03/18,667.29
  6. Step 6: Final answer
    x = 12,404.39

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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.