Home / 13,581.65-20,370.03-3,720.09

Finding the Fourth Proportional to 13,581.65, 20,370.03 and 3,720.09

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Solution

The fourth proportional to 13,581.65, 20,370.03 and 3,720.09 is: 5,579.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.65 : 20,370.03 = 3,720.09 : x
  2. Step 2: Convert to fraction form
    13,581.65/20,370.03 = 3,720.09/x
  3. Step 3: Cross multiply
    13,581.65x = 20,370.03 × 3,720.09
  4. Step 4: Simplify right side
    13,581.65x = 75,778,344.90
  5. Step 5: Solve for x
    x = 75,778,344.90/13,581.65
  6. Step 6: Final answer
    x = 5,579.47

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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.