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Finding the Fourth Proportional to 18,696.84, 25,778.24 and 11,971.42

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Solution

The fourth proportional to 18,696.84, 25,778.24 and 11,971.42 is: 16,505.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.84 : 25,778.24 = 11,971.42 : x
  2. Step 2: Convert to fraction form
    18,696.84/25,778.24 = 11,971.42/x
  3. Step 3: Cross multiply
    18,696.84x = 25,778.24 × 11,971.42
  4. Step 4: Simplify right side
    18,696.84x = 308,602,137.90
  5. Step 5: Solve for x
    x = 308,602,137.90/18,696.84
  6. Step 6: Final answer
    x = 16,505.58

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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.