Home / 12,143.21-18,207.24-5,119.61

Finding the Fourth Proportional to 12,143.21, 18,207.24 and 5,119.61

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Solution

The fourth proportional to 12,143.21, 18,207.24 and 5,119.61 is: 7,676.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.21 : 18,207.24 = 5,119.61 : x
  2. Step 2: Convert to fraction form
    12,143.21/18,207.24 = 5,119.61/x
  3. Step 3: Cross multiply
    12,143.21x = 18,207.24 × 5,119.61
  4. Step 4: Simplify right side
    12,143.21x = 93,213,876.94
  5. Step 5: Solve for x
    x = 93,213,876.94/12,143.21
  6. Step 6: Final answer
    x = 7,676.22

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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.