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Finding the Fourth Proportional to 18,263.88, 27,376.16 and 7,731.44

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Solution

The fourth proportional to 18,263.88, 27,376.16 and 7,731.44 is: 11,588.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,263.88 : 27,376.16 = 7,731.44 : x
  2. Step 2: Convert to fraction form
    18,263.88/27,376.16 = 7,731.44/x
  3. Step 3: Cross multiply
    18,263.88x = 27,376.16 × 7,731.44
  4. Step 4: Simplify right side
    18,263.88x = 211,657,138.47
  5. Step 5: Solve for x
    x = 211,657,138.47/18,263.88
  6. Step 6: Final answer
    x = 11,588.84

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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.