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Finding the Fourth Proportional to 18,956, 26,158.72 and 10,997.68

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Solution

The fourth proportional to 18,956, 26,158.72 and 10,997.68 is: 15,176.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,956 : 26,158.72 = 10,997.68 : x
  2. Step 2: Convert to fraction form
    18,956/26,158.72 = 10,997.68/x
  3. Step 3: Cross multiply
    18,956x = 26,158.72 × 10,997.68
  4. Step 4: Simplify right side
    18,956x = 287,685,231.77
  5. Step 5: Solve for x
    x = 287,685,231.77/18,956
  6. Step 6: Final answer
    x = 15,176.47

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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.