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Finding the Fourth Proportional to 50,711.88, 69,982.12 and 28,355.88

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Solution

The fourth proportional to 50,711.88, 69,982.12 and 28,355.88 is: 39,130.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    50,711.88 : 69,982.12 = 28,355.88 : x
  2. Step 2: Convert to fraction form
    50,711.88/69,982.12 = 28,355.88/x
  3. Step 3: Cross multiply
    50,711.88x = 69,982.12 × 28,355.88
  4. Step 4: Simplify right side
    50,711.88x = 1,984,404,596.87
  5. Step 5: Solve for x
    x = 1,984,404,596.87/50,711.88
  6. Step 6: Final answer
    x = 39,130.96

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.