Home / 13,771.28-20,656.87-3,910.56

Finding the Fourth Proportional to 13,771.28, 20,656.87 and 3,910.56

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Solution

The fourth proportional to 13,771.28, 20,656.87 and 3,910.56 is: 5,865.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,771.28 : 20,656.87 = 3,910.56 : x
  2. Step 2: Convert to fraction form
    13,771.28/20,656.87 = 3,910.56/x
  3. Step 3: Cross multiply
    13,771.28x = 20,656.87 × 3,910.56
  4. Step 4: Simplify right side
    13,771.28x = 80,779,929.55
  5. Step 5: Solve for x
    x = 80,779,929.55/13,771.28
  6. Step 6: Final answer
    x = 5,865.83

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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.