Home / 13,279.73-19,916.52-3,920.39

Finding the Fourth Proportional to 13,279.73, 19,916.52 and 3,920.39

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Solution

The fourth proportional to 13,279.73, 19,916.52 and 3,920.39 is: 5,879.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,279.73 : 19,916.52 = 3,920.39 : x
  2. Step 2: Convert to fraction form
    13,279.73/19,916.52 = 3,920.39/x
  3. Step 3: Cross multiply
    13,279.73x = 19,916.52 × 3,920.39
  4. Step 4: Simplify right side
    13,279.73x = 78,080,506.24
  5. Step 5: Solve for x
    x = 78,080,506.24/13,279.73
  6. Step 6: Final answer
    x = 5,879.68

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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.