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Finding the Fourth Proportional to 43,725.75, 65,599.70 and 12,561

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Solution

The fourth proportional to 43,725.75, 65,599.70 and 12,561 is: 18,844.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,725.75 : 65,599.70 = 12,561 : x
  2. Step 2: Convert to fraction form
    43,725.75/65,599.70 = 12,561/x
  3. Step 3: Cross multiply
    43,725.75x = 65,599.70 × 12,561
  4. Step 4: Simplify right side
    43,725.75x = 823,997,768.90
  5. Step 5: Solve for x
    x = 823,997,768.90/43,725.75
  6. Step 6: Final answer
    x = 18,844.68

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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.