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Finding the Fourth Proportional to 20,608.20, 30,912.30 and 19,225.80

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Solution

The fourth proportional to 20,608.20, 30,912.30 and 19,225.80 is: 28,838.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.20 : 30,912.30 = 19,225.80 : x
  2. Step 2: Convert to fraction form
    20,608.20/30,912.30 = 19,225.80/x
  3. Step 3: Cross multiply
    20,608.20x = 30,912.30 × 19,225.80
  4. Step 4: Simplify right side
    20,608.20x = 594,313,697.34
  5. Step 5: Solve for x
    x = 594,313,697.34/20,608.20
  6. Step 6: Final answer
    x = 28,838.70

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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.