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Finding the Fourth Proportional to 20,334.20, 30,486.90 and 7,849.40

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Solution

The fourth proportional to 20,334.20, 30,486.90 and 7,849.40 is: 11,768.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,334.20 : 30,486.90 = 7,849.40 : x
  2. Step 2: Convert to fraction form
    20,334.20/30,486.90 = 7,849.40/x
  3. Step 3: Cross multiply
    20,334.20x = 30,486.90 × 7,849.40
  4. Step 4: Simplify right side
    20,334.20x = 239,303,872.86
  5. Step 5: Solve for x
    x = 239,303,872.86/20,334.20
  6. Step 6: Final answer
    x = 11,768.54

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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.