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Finding the Fourth Proportional to 18,940.61, 26,137.78 and 10,982.63

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Solution

The fourth proportional to 18,940.61, 26,137.78 and 10,982.63 is: 15,155.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,940.61 : 26,137.78 = 10,982.63 : x
  2. Step 2: Convert to fraction form
    18,940.61/26,137.78 = 10,982.63/x
  3. Step 3: Cross multiply
    18,940.61x = 26,137.78 × 10,982.63
  4. Step 4: Simplify right side
    18,940.61x = 287,061,566.76
  5. Step 5: Solve for x
    x = 287,061,566.76/18,940.61
  6. Step 6: Final answer
    x = 15,155.88

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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.