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Finding the Fourth Proportional to 18,676.17, 27,964.82 and 15,403.88

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Solution

The fourth proportional to 18,676.17, 27,964.82 and 15,403.88 is: 23,065.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,676.17 : 27,964.82 = 15,403.88 : x
  2. Step 2: Convert to fraction form
    18,676.17/27,964.82 = 15,403.88/x
  3. Step 3: Cross multiply
    18,676.17x = 27,964.82 × 15,403.88
  4. Step 4: Simplify right side
    18,676.17x = 430,766,731.50
  5. Step 5: Solve for x
    x = 430,766,731.50/18,676.17
  6. Step 6: Final answer
    x = 23,065.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.