Home / 13,412.39-20,120.40-5,619.38

Finding the Fourth Proportional to 13,412.39, 20,120.40 and 5,619.38

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Solution

The fourth proportional to 13,412.39, 20,120.40 and 5,619.38 is: 8,429.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,412.39 : 20,120.40 = 5,619.38 : x
  2. Step 2: Convert to fraction form
    13,412.39/20,120.40 = 5,619.38/x
  3. Step 3: Cross multiply
    13,412.39x = 20,120.40 × 5,619.38
  4. Step 4: Simplify right side
    13,412.39x = 113,064,072.75
  5. Step 5: Solve for x
    x = 113,064,072.75/13,412.39
  6. Step 6: Final answer
    x = 8,429.83

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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.