Home / 13,910.31-20,865.26-3,380.42

Finding the Fourth Proportional to 13,910.31, 20,865.26 and 3,380.42

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Solution

The fourth proportional to 13,910.31, 20,865.26 and 3,380.42 is: 5,070.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.31 : 20,865.26 = 3,380.42 : x
  2. Step 2: Convert to fraction form
    13,910.31/20,865.26 = 3,380.42/x
  3. Step 3: Cross multiply
    13,910.31x = 20,865.26 × 3,380.42
  4. Step 4: Simplify right side
    13,910.31x = 70,533,402.82
  5. Step 5: Solve for x
    x = 70,533,402.82/13,910.31
  6. Step 6: Final answer
    x = 5,070.58

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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.