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Finding the Fourth Proportional to 18,309.28, 27,466.08 and 13,721.44

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Solution

The fourth proportional to 18,309.28, 27,466.08 and 13,721.44 is: 20,583.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309.28 : 27,466.08 = 13,721.44 : x
  2. Step 2: Convert to fraction form
    18,309.28/27,466.08 = 13,721.44/x
  3. Step 3: Cross multiply
    18,309.28x = 27,466.08 × 13,721.44
  4. Step 4: Simplify right side
    18,309.28x = 376,874,168.76
  5. Step 5: Solve for x
    x = 376,874,168.76/18,309.28
  6. Step 6: Final answer
    x = 20,583.78

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1.5x scale

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.