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Finding the Fourth Proportional to 19,191.75, 28,787.63 and 8,247.75

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Solution

The fourth proportional to 19,191.75, 28,787.63 and 8,247.75 is: 12,371.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191.75 : 28,787.63 = 8,247.75 : x
  2. Step 2: Convert to fraction form
    19,191.75/28,787.63 = 8,247.75/x
  3. Step 3: Cross multiply
    19,191.75x = 28,787.63 × 8,247.75
  4. Step 4: Simplify right side
    19,191.75x = 237,433,134.09
  5. Step 5: Solve for x
    x = 237,433,134.09/19,191.75
  6. Step 6: Final answer
    x = 12,371.63

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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.