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Finding the Fourth Proportional to 57,728.60, 86,571.30 and 20,274.20

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Solution

The fourth proportional to 57,728.60, 86,571.30 and 20,274.20 is: 30,403.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,728.60 : 86,571.30 = 20,274.20 : x
  2. Step 2: Convert to fraction form
    57,728.60/86,571.30 = 20,274.20/x
  3. Step 3: Cross multiply
    57,728.60x = 86,571.30 × 20,274.20
  4. Step 4: Simplify right side
    57,728.60x = 1,755,163,850.46
  5. Step 5: Solve for x
    x = 1,755,163,850.46/57,728.60
  6. Step 6: Final answer
    x = 30,403.71

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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.