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Finding the Fourth Proportional to 12,524.75, 18,787.09 and 5,129.21

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Solution

The fourth proportional to 12,524.75, 18,787.09 and 5,129.21 is: 7,693.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,524.75 : 18,787.09 = 5,129.21 : x
  2. Step 2: Convert to fraction form
    12,524.75/18,787.09 = 5,129.21/x
  3. Step 3: Cross multiply
    12,524.75x = 18,787.09 × 5,129.21
  4. Step 4: Simplify right side
    12,524.75x = 96,362,929.90
  5. Step 5: Solve for x
    x = 96,362,929.90/12,524.75
  6. Step 6: Final answer
    x = 7,693.80

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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.