Home / 13,240.89-19,861.20-3,380.09

Finding the Fourth Proportional to 13,240.89, 19,861.20 and 3,380.09

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Solution

The fourth proportional to 13,240.89, 19,861.20 and 3,380.09 is: 5,070.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.89 : 19,861.20 = 3,380.09 : x
  2. Step 2: Convert to fraction form
    13,240.89/19,861.20 = 3,380.09/x
  3. Step 3: Cross multiply
    13,240.89x = 19,861.20 × 3,380.09
  4. Step 4: Simplify right side
    13,240.89x = 67,132,544.20
  5. Step 5: Solve for x
    x = 67,132,544.20/13,240.89
  6. Step 6: Final answer
    x = 5,070.09

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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.