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Finding the Fourth Proportional to 33,740.45, 50,561.45 and 18,978.20

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Solution

The fourth proportional to 33,740.45, 50,561.45 and 18,978.20 is: 28,439.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,740.45 : 50,561.45 = 18,978.20 : x
  2. Step 2: Convert to fraction form
    33,740.45/50,561.45 = 18,978.20/x
  3. Step 3: Cross multiply
    33,740.45x = 50,561.45 × 18,978.20
  4. Step 4: Simplify right side
    33,740.45x = 959,565,223.47
  5. Step 5: Solve for x
    x = 959,565,223.47/33,740.45
  6. Step 6: Final answer
    x = 28,439.61

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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.