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Finding the Fourth Proportional to 18,505.02, 27,757.80 and 8,643

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Solution

The fourth proportional to 18,505.02, 27,757.80 and 8,643 is: 12,964.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,505.02 : 27,757.80 = 8,643 : x
  2. Step 2: Convert to fraction form
    18,505.02/27,757.80 = 8,643/x
  3. Step 3: Cross multiply
    18,505.02x = 27,757.80 × 8,643
  4. Step 4: Simplify right side
    18,505.02x = 239,910,665.40
  5. Step 5: Solve for x
    x = 239,910,665.40/18,505.02
  6. Step 6: Final answer
    x = 12,964.63

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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.