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Finding the Fourth Proportional to 18,912.53, 28,364.24 and 8,376.73

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Solution

The fourth proportional to 18,912.53, 28,364.24 and 8,376.73 is: 12,563.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.53 : 28,364.24 = 8,376.73 : x
  2. Step 2: Convert to fraction form
    18,912.53/28,364.24 = 8,376.73/x
  3. Step 3: Cross multiply
    18,912.53x = 28,364.24 × 8,376.73
  4. Step 4: Simplify right side
    18,912.53x = 237,599,580.14
  5. Step 5: Solve for x
    x = 237,599,580.14/18,912.53
  6. Step 6: Final answer
    x = 12,563.08

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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.