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Finding the Fourth Proportional to 19,759.63, 29,639.44 and 8,072.85

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Solution

The fourth proportional to 19,759.63, 29,639.44 and 8,072.85 is: 12,109.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,759.63 : 29,639.44 = 8,072.85 : x
  2. Step 2: Convert to fraction form
    19,759.63/29,639.44 = 8,072.85/x
  3. Step 3: Cross multiply
    19,759.63x = 29,639.44 × 8,072.85
  4. Step 4: Simplify right side
    19,759.63x = 239,274,652.15
  5. Step 5: Solve for x
    x = 239,274,652.15/19,759.63
  6. Step 6: Final answer
    x = 12,109.27

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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.