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Finding the Fourth Proportional to 18,620.66, 27,912.36 and 10,304.40

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Solution

The fourth proportional to 18,620.66, 27,912.36 and 10,304.40 is: 15,446.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,620.66 : 27,912.36 = 10,304.40 : x
  2. Step 2: Convert to fraction form
    18,620.66/27,912.36 = 10,304.40/x
  3. Step 3: Cross multiply
    18,620.66x = 27,912.36 × 10,304.40
  4. Step 4: Simplify right side
    18,620.66x = 287,620,122.38
  5. Step 5: Solve for x
    x = 287,620,122.38/18,620.66
  6. Step 6: Final answer
    x = 15,446.29

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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.