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Finding the Fourth Proportional to 18,135.92, 25,021.14 and 11,851.94

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Solution

The fourth proportional to 18,135.92, 25,021.14 and 11,851.94 is: 16,351.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,135.92 : 25,021.14 = 11,851.94 : x
  2. Step 2: Convert to fraction form
    18,135.92/25,021.14 = 11,851.94/x
  3. Step 3: Cross multiply
    18,135.92x = 25,021.14 × 11,851.94
  4. Step 4: Simplify right side
    18,135.92x = 296,548,924.91
  5. Step 5: Solve for x
    x = 296,548,924.91/18,135.92
  6. Step 6: Final answer
    x = 16,351.47

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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.