Home / 21,442.78-29,582.52-13,371.68

Finding the Fourth Proportional to 21,442.78, 29,582.52 and 13,371.68

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Solution

The fourth proportional to 21,442.78, 29,582.52 and 13,371.68 is: 18,447.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,442.78 : 29,582.52 = 13,371.68 : x
  2. Step 2: Convert to fraction form
    21,442.78/29,582.52 = 13,371.68/x
  3. Step 3: Cross multiply
    21,442.78x = 29,582.52 × 13,371.68
  4. Step 4: Simplify right side
    21,442.78x = 395,568,014.85
  5. Step 5: Solve for x
    x = 395,568,014.85/21,442.78
  6. Step 6: Final answer
    x = 18,447.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.