Home / 13,581.36-20,375.28-5,261.58

Finding the Fourth Proportional to 13,581.36, 20,375.28 and 5,261.58

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Solution

The fourth proportional to 13,581.36, 20,375.28 and 5,261.58 is: 7,893.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.36 : 20,375.28 = 5,261.58 : x
  2. Step 2: Convert to fraction form
    13,581.36/20,375.28 = 5,261.58/x
  3. Step 3: Cross multiply
    13,581.36x = 20,375.28 × 5,261.58
  4. Step 4: Simplify right side
    13,581.36x = 107,206,165.74
  5. Step 5: Solve for x
    x = 107,206,165.74/13,581.36
  6. Step 6: Final answer
    x = 7,893.63

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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.