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Finding the Fourth Proportional to 18,940.98, 26,138.04 and 10,982.70

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Solution

The fourth proportional to 18,940.98, 26,138.04 and 10,982.70 is: 15,155.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.98 : 26,138.04 = 10,982.70 : x
  2. Step 2: Convert to fraction form
    18,940.98/26,138.04 = 10,982.70/x
  3. Step 3: Cross multiply
    18,940.98x = 26,138.04 × 10,982.70
  4. Step 4: Simplify right side
    18,940.98x = 287,066,251.91
  5. Step 5: Solve for x
    x = 287,066,251.91/18,940.98
  6. Step 6: Final answer
    x = 15,155.83

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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.