Home / 13,219.82-19,826.65-3,857.87

Finding the Fourth Proportional to 13,219.82, 19,826.65 and 3,857.87

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Solution

The fourth proportional to 13,219.82, 19,826.65 and 3,857.87 is: 5,785.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.82 : 19,826.65 = 3,857.87 : x
  2. Step 2: Convert to fraction form
    13,219.82/19,826.65 = 3,857.87/x
  3. Step 3: Cross multiply
    13,219.82x = 19,826.65 × 3,857.87
  4. Step 4: Simplify right side
    13,219.82x = 76,488,638.24
  5. Step 5: Solve for x
    x = 76,488,638.24/13,219.82
  6. Step 6: Final answer
    x = 5,785.91

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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.