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Finding the Fourth Proportional to 18,639.62, 27,964.04 and 15,313.49

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Solution

The fourth proportional to 18,639.62, 27,964.04 and 15,313.49 is: 22,974.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.62 : 27,964.04 = 15,313.49 : x
  2. Step 2: Convert to fraction form
    18,639.62/27,964.04 = 15,313.49/x
  3. Step 3: Cross multiply
    18,639.62x = 27,964.04 × 15,313.49
  4. Step 4: Simplify right side
    18,639.62x = 428,227,046.90
  5. Step 5: Solve for x
    x = 428,227,046.90/18,639.62
  6. Step 6: Final answer
    x = 22,974.02

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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.