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Finding the Fourth Proportional to 18,696, 25,793.43 and 11,980.74

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Solution

The fourth proportional to 18,696, 25,793.43 and 11,980.74 is: 16,528.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696 : 25,793.43 = 11,980.74 : x
  2. Step 2: Convert to fraction form
    18,696/25,793.43 = 11,980.74/x
  3. Step 3: Cross multiply
    18,696x = 25,793.43 × 11,980.74
  4. Step 4: Simplify right side
    18,696x = 309,024,378.54
  5. Step 5: Solve for x
    x = 309,024,378.54/18,696
  6. Step 6: Final answer
    x = 16,528.90

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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.