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Finding the Fourth Proportional to 12,692.70, 19,039.86 and 3,926.88

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Solution

The fourth proportional to 12,692.70, 19,039.86 and 3,926.88 is: 5,890.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.70 : 19,039.86 = 3,926.88 : x
  2. Step 2: Convert to fraction form
    12,692.70/19,039.86 = 3,926.88/x
  3. Step 3: Cross multiply
    12,692.70x = 19,039.86 × 3,926.88
  4. Step 4: Simplify right side
    12,692.70x = 74,767,245.44
  5. Step 5: Solve for x
    x = 74,767,245.44/12,692.70
  6. Step 6: Final answer
    x = 5,890.57

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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.