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Finding the Fourth Proportional to 36,751.90, 50,720.34 and 20,837.80

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Solution

The fourth proportional to 36,751.90, 50,720.34 and 20,837.80 is: 28,757.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,751.90 : 50,720.34 = 20,837.80 : x
  2. Step 2: Convert to fraction form
    36,751.90/50,720.34 = 20,837.80/x
  3. Step 3: Cross multiply
    36,751.90x = 50,720.34 × 20,837.80
  4. Step 4: Simplify right side
    36,751.90x = 1,056,900,300.85
  5. Step 5: Solve for x
    x = 1,056,900,300.85/36,751.90
  6. Step 6: Final answer
    x = 28,757.71

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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.