Home / 13,778.21-20,659.73-4,287.96

Finding the Fourth Proportional to 13,778.21, 20,659.73 and 4,287.96

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Solution

The fourth proportional to 13,778.21, 20,659.73 and 4,287.96 is: 6,429.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.21 : 20,659.73 = 4,287.96 : x
  2. Step 2: Convert to fraction form
    13,778.21/20,659.73 = 4,287.96/x
  3. Step 3: Cross multiply
    13,778.21x = 20,659.73 × 4,287.96
  4. Step 4: Simplify right side
    13,778.21x = 88,588,074.41
  5. Step 5: Solve for x
    x = 88,588,074.41/13,778.21
  6. Step 6: Final answer
    x = 6,429.58

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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.