Home / 13,771.20-20,657.59-3,909.71

Finding the Fourth Proportional to 13,771.20, 20,657.59 and 3,909.71

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Solution

The fourth proportional to 13,771.20, 20,657.59 and 3,909.71 is: 5,864.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,771.20 : 20,657.59 = 3,909.71 : x
  2. Step 2: Convert to fraction form
    13,771.20/20,657.59 = 3,909.71/x
  3. Step 3: Cross multiply
    13,771.20x = 20,657.59 × 3,909.71
  4. Step 4: Simplify right side
    13,771.20x = 80,765,186.20
  5. Step 5: Solve for x
    x = 80,765,186.20/13,771.20
  6. Step 6: Final answer
    x = 5,864.79

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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.