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Finding the Fourth Proportional to 12,861.56, 19,293.90 and 3,627.56

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Solution

The fourth proportional to 12,861.56, 19,293.90 and 3,627.56 is: 5,441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,861.56 : 19,293.90 = 3,627.56 : x
  2. Step 2: Convert to fraction form
    12,861.56/19,293.90 = 3,627.56/x
  3. Step 3: Cross multiply
    12,861.56x = 19,293.90 × 3,627.56
  4. Step 4: Simplify right side
    12,861.56x = 69,989,779.88
  5. Step 5: Solve for x
    x = 69,989,779.88/12,861.56
  6. Step 6: Final answer
    x = 5,441.78

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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.