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Finding the Fourth Proportional to 30,809.78, 46,212.85 and 8,622.67

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Solution

The fourth proportional to 30,809.78, 46,212.85 and 8,622.67 is: 12,933.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,809.78 : 46,212.85 = 8,622.67 : x
  2. Step 2: Convert to fraction form
    30,809.78/46,212.85 = 8,622.67/x
  3. Step 3: Cross multiply
    30,809.78x = 46,212.85 × 8,622.67
  4. Step 4: Simplify right side
    30,809.78x = 398,478,050.56
  5. Step 5: Solve for x
    x = 398,478,050.56/30,809.78
  6. Step 6: Final answer
    x = 12,933.49

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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.