Home / 20,517.20-30,771.60-5,722.40

Finding the Fourth Proportional to 20,517.20, 30,771.60 and 5,722.40

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Solution

The fourth proportional to 20,517.20, 30,771.60 and 5,722.40 is: 8,582.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.20 : 30,771.60 = 5,722.40 : x
  2. Step 2: Convert to fraction form
    20,517.20/30,771.60 = 5,722.40/x
  3. Step 3: Cross multiply
    20,517.20x = 30,771.60 × 5,722.40
  4. Step 4: Simplify right side
    20,517.20x = 176,087,403.84
  5. Step 5: Solve for x
    x = 176,087,403.84/20,517.20
  6. Step 6: Final answer
    x = 8,582.43

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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.