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Finding the Fourth Proportional to 12,609.92, 18,919.20 and 4,820.96

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Solution

The fourth proportional to 12,609.92, 18,919.20 and 4,820.96 is: 7,233.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,609.92 : 18,919.20 = 4,820.96 : x
  2. Step 2: Convert to fraction form
    12,609.92/18,919.20 = 4,820.96/x
  3. Step 3: Cross multiply
    12,609.92x = 18,919.20 × 4,820.96
  4. Step 4: Simplify right side
    12,609.92x = 91,208,706.43
  5. Step 5: Solve for x
    x = 91,208,706.43/12,609.92
  6. Step 6: Final answer
    x = 7,233.09

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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.