Home / 13,620.13-20,429.64-3,759.16

Finding the Fourth Proportional to 13,620.13, 20,429.64 and 3,759.16

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Solution

The fourth proportional to 13,620.13, 20,429.64 and 3,759.16 is: 5,638.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.13 : 20,429.64 = 3,759.16 : x
  2. Step 2: Convert to fraction form
    13,620.13/20,429.64 = 3,759.16/x
  3. Step 3: Cross multiply
    13,620.13x = 20,429.64 × 3,759.16
  4. Step 4: Simplify right side
    13,620.13x = 76,798,183.35
  5. Step 5: Solve for x
    x = 76,798,183.35/13,620.13
  6. Step 6: Final answer
    x = 5,638.58

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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.