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Finding the Fourth Proportional to 12,692.43, 19,060.43 and 7,790.85

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Solution

The fourth proportional to 12,692.43, 19,060.43 and 7,790.85 is: 11,699.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,692.43 : 19,060.43 = 7,790.85 : x
  2. Step 2: Convert to fraction form
    12,692.43/19,060.43 = 7,790.85/x
  3. Step 3: Cross multiply
    12,692.43x = 19,060.43 × 7,790.85
  4. Step 4: Simplify right side
    12,692.43x = 148,496,912.11
  5. Step 5: Solve for x
    x = 148,496,912.11/12,692.43
  6. Step 6: Final answer
    x = 11,699.64

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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.