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Finding the Fourth Proportional to 39,955.88, 59,912.95 and 11,872.07

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Solution

The fourth proportional to 39,955.88, 59,912.95 and 11,872.07 is: 17,801.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,955.88 : 59,912.95 = 11,872.07 : x
  2. Step 2: Convert to fraction form
    39,955.88/59,912.95 = 11,872.07/x
  3. Step 3: Cross multiply
    39,955.88x = 59,912.95 × 11,872.07
  4. Step 4: Simplify right side
    39,955.88x = 711,290,736.31
  5. Step 5: Solve for x
    x = 711,290,736.31/39,955.88
  6. Step 6: Final answer
    x = 17,801.90

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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.