Home / 13,896-20,849.78-5,581.91

Finding the Fourth Proportional to 13,896, 20,849.78 and 5,581.91

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Solution

The fourth proportional to 13,896, 20,849.78 and 5,581.91 is: 8,375.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,896 : 20,849.78 = 5,581.91 : x
  2. Step 2: Convert to fraction form
    13,896/20,849.78 = 5,581.91/x
  3. Step 3: Cross multiply
    13,896x = 20,849.78 × 5,581.91
  4. Step 4: Simplify right side
    13,896x = 116,381,619.69
  5. Step 5: Solve for x
    x = 116,381,619.69/13,896
  6. Step 6: Final answer
    x = 8,375.19

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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.