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Finding the Fourth Proportional to 12,401.78, 18,579.21 and 9,614.80

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Solution

The fourth proportional to 12,401.78, 18,579.21 and 9,614.80 is: 14,404.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,401.78 : 18,579.21 = 9,614.80 : x
  2. Step 2: Convert to fraction form
    12,401.78/18,579.21 = 9,614.80/x
  3. Step 3: Cross multiply
    12,401.78x = 18,579.21 × 9,614.80
  4. Step 4: Simplify right side
    12,401.78x = 178,635,375.48
  5. Step 5: Solve for x
    x = 178,635,375.48/12,401.78
  6. Step 6: Final answer
    x = 14,404.02

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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.