Home / 13,580.13-20,379.23-5,581.45

Finding the Fourth Proportional to 13,580.13, 20,379.23 and 5,581.45

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Solution

The fourth proportional to 13,580.13, 20,379.23 and 5,581.45 is: 8,375.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,580.13 : 20,379.23 = 5,581.45 : x
  2. Step 2: Convert to fraction form
    13,580.13/20,379.23 = 5,581.45/x
  3. Step 3: Cross multiply
    13,580.13x = 20,379.23 × 5,581.45
  4. Step 4: Simplify right side
    13,580.13x = 113,745,676.32
  5. Step 5: Solve for x
    x = 113,745,676.32/13,580.13
  6. Step 6: Final answer
    x = 8,375.89

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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.