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Finding the Fourth Proportional to 30,363.96, 41,912.46 and 20,809.56

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Solution

The fourth proportional to 30,363.96, 41,912.46 and 20,809.56 is: 28,724.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,363.96 : 41,912.46 = 20,809.56 : x
  2. Step 2: Convert to fraction form
    30,363.96/41,912.46 = 20,809.56/x
  3. Step 3: Cross multiply
    30,363.96x = 41,912.46 × 20,809.56
  4. Step 4: Simplify right side
    30,363.96x = 872,179,851.12
  5. Step 5: Solve for x
    x = 872,179,851.12/30,363.96
  6. Step 6: Final answer
    x = 28,724.18

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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.