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Finding the Fourth Proportional to 12,573.86, 18,860.79 and 3,213.90

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Solution

The fourth proportional to 12,573.86, 18,860.79 and 3,213.90 is: 4,820.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,573.86 : 18,860.79 = 3,213.90 : x
  2. Step 2: Convert to fraction form
    12,573.86/18,860.79 = 3,213.90/x
  3. Step 3: Cross multiply
    12,573.86x = 18,860.79 × 3,213.90
  4. Step 4: Simplify right side
    12,573.86x = 60,616,692.98
  5. Step 5: Solve for x
    x = 60,616,692.98/12,573.86
  6. Step 6: Final answer
    x = 4,820.85

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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.