Home / 9,131.21-13,690.63-3,581.09

Finding the Fourth Proportional to 9,131.21, 13,690.63 and 3,581.09

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Solution

The fourth proportional to 9,131.21, 13,690.63 and 3,581.09 is: 5,369.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,131.21 : 13,690.63 = 3,581.09 : x
  2. Step 2: Convert to fraction form
    9,131.21/13,690.63 = 3,581.09/x
  3. Step 3: Cross multiply
    9,131.21x = 13,690.63 × 3,581.09
  4. Step 4: Simplify right side
    9,131.21x = 49,027,378.19
  5. Step 5: Solve for x
    x = 49,027,378.19/9,131.21
  6. Step 6: Final answer
    x = 5,369.21

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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.