Home / 13,854.26-20,778.42-3,991.70

Finding the Fourth Proportional to 13,854.26, 20,778.42 and 3,991.70

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Solution

The fourth proportional to 13,854.26, 20,778.42 and 3,991.70 is: 5,986.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,854.26 : 20,778.42 = 3,991.70 : x
  2. Step 2: Convert to fraction form
    13,854.26/20,778.42 = 3,991.70/x
  3. Step 3: Cross multiply
    13,854.26x = 20,778.42 × 3,991.70
  4. Step 4: Simplify right side
    13,854.26x = 82,941,219.11
  5. Step 5: Solve for x
    x = 82,941,219.11/13,854.26
  6. Step 6: Final answer
    x = 5,986.69

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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.