Home / 13,346.88-20,021.38-3,986.21

Finding the Fourth Proportional to 13,346.88, 20,021.38 and 3,986.21

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Solution

The fourth proportional to 13,346.88, 20,021.38 and 3,986.21 is: 5,979.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,346.88 : 20,021.38 = 3,986.21 : x
  2. Step 2: Convert to fraction form
    13,346.88/20,021.38 = 3,986.21/x
  3. Step 3: Cross multiply
    13,346.88x = 20,021.38 × 3,986.21
  4. Step 4: Simplify right side
    13,346.88x = 79,809,465.26
  5. Step 5: Solve for x
    x = 79,809,465.26/13,346.88
  6. Step 6: Final answer
    x = 5,979.64

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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.