Home / 13,910.10-20,865.14-3,380.05

Finding the Fourth Proportional to 13,910.10, 20,865.14 and 3,380.05

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Solution

The fourth proportional to 13,910.10, 20,865.14 and 3,380.05 is: 5,070.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.10 : 20,865.14 = 3,380.05 : x
  2. Step 2: Convert to fraction form
    13,910.10/20,865.14 = 3,380.05/x
  3. Step 3: Cross multiply
    13,910.10x = 20,865.14 × 3,380.05
  4. Step 4: Simplify right side
    13,910.10x = 70,525,216.46
  5. Step 5: Solve for x
    x = 70,525,216.46/13,910.10
  6. Step 6: Final answer
    x = 5,070.07

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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.