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Finding the Fourth Proportional to 53,791.65, 80,657.10 and 20,512.80

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Solution

The fourth proportional to 53,791.65, 80,657.10 and 20,512.80 is: 30,757.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,791.65 : 80,657.10 = 20,512.80 : x
  2. Step 2: Convert to fraction form
    53,791.65/80,657.10 = 20,512.80/x
  3. Step 3: Cross multiply
    53,791.65x = 80,657.10 × 20,512.80
  4. Step 4: Simplify right side
    53,791.65x = 1,654,502,960.88
  5. Step 5: Solve for x
    x = 1,654,502,960.88/53,791.65
  6. Step 6: Final answer
    x = 30,757.62

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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.