Home / 13,739.61-20,609.46-3,878.94

Finding the Fourth Proportional to 13,739.61, 20,609.46 and 3,878.94

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Solution

The fourth proportional to 13,739.61, 20,609.46 and 3,878.94 is: 5,818.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,739.61 : 20,609.46 = 3,878.94 : x
  2. Step 2: Convert to fraction form
    13,739.61/20,609.46 = 3,878.94/x
  3. Step 3: Cross multiply
    13,739.61x = 20,609.46 × 3,878.94
  4. Step 4: Simplify right side
    13,739.61x = 79,942,858.77
  5. Step 5: Solve for x
    x = 79,942,858.77/13,739.61
  6. Step 6: Final answer
    x = 5,818.42

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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.