Home / 13,408.40-20,117.40-5,619.60

Finding the Fourth Proportional to 13,408.40, 20,117.40 and 5,619.60

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Solution

The fourth proportional to 13,408.40, 20,117.40 and 5,619.60 is: 8,431.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,408.40 : 20,117.40 = 5,619.60 : x
  2. Step 2: Convert to fraction form
    13,408.40/20,117.40 = 5,619.60/x
  3. Step 3: Cross multiply
    13,408.40x = 20,117.40 × 5,619.60
  4. Step 4: Simplify right side
    13,408.40x = 113,051,741.04
  5. Step 5: Solve for x
    x = 113,051,741.04/13,408.40
  6. Step 6: Final answer
    x = 8,431.41

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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.