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Finding the Fourth Proportional to 27,138.44, 40,654.66 and 18,703.44

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Solution

The fourth proportional to 27,138.44, 40,654.66 and 18,703.44 is: 28,018.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,138.44 : 40,654.66 = 18,703.44 : x
  2. Step 2: Convert to fraction form
    27,138.44/40,654.66 = 18,703.44/x
  3. Step 3: Cross multiply
    27,138.44x = 40,654.66 × 18,703.44
  4. Step 4: Simplify right side
    27,138.44x = 760,381,994.03
  5. Step 5: Solve for x
    x = 760,381,994.03/27,138.44
  6. Step 6: Final answer
    x = 28,018.63

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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.