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Finding the Fourth Proportional to 39,955.82, 59,912.87 and 11,872.00

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Solution

The fourth proportional to 39,955.82, 59,912.87 and 11,872.00 is: 17,801.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,955.82 : 59,912.87 = 11,872.00 : x
  2. Step 2: Convert to fraction form
    39,955.82/59,912.87 = 11,872.00/x
  3. Step 3: Cross multiply
    39,955.82x = 59,912.87 × 11,872.00
  4. Step 4: Simplify right side
    39,955.82x = 711,285,608.17
  5. Step 5: Solve for x
    x = 711,285,608.17/39,955.82
  6. Step 6: Final answer
    x = 17,801.80

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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.