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Finding the Fourth Proportional to 36,693.30, 50,636.90 and 20,780.80

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Solution

The fourth proportional to 36,693.30, 50,636.90 and 20,780.80 is: 28,677.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,693.30 : 50,636.90 = 20,780.80 : x
  2. Step 2: Convert to fraction form
    36,693.30/50,636.90 = 20,780.80/x
  3. Step 3: Cross multiply
    36,693.30x = 50,636.90 × 20,780.80
  4. Step 4: Simplify right side
    36,693.30x = 1,052,275,291.52
  5. Step 5: Solve for x
    x = 1,052,275,291.52/36,693.30
  6. Step 6: Final answer
    x = 28,677.59

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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.