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Finding the Fourth Proportional to 18,243.78, 25,181.19 and 11,887.80

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Solution

The fourth proportional to 18,243.78, 25,181.19 and 11,887.80 is: 16,408.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,243.78 : 25,181.19 = 11,887.80 : x
  2. Step 2: Convert to fraction form
    18,243.78/25,181.19 = 11,887.80/x
  3. Step 3: Cross multiply
    18,243.78x = 25,181.19 × 11,887.80
  4. Step 4: Simplify right side
    18,243.78x = 299,348,950.48
  5. Step 5: Solve for x
    x = 299,348,950.48/18,243.78
  6. Step 6: Final answer
    x = 16,408.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.