Home / 21,398.22-29,531.52-11,969.82

Finding the Fourth Proportional to 21,398.22, 29,531.52 and 11,969.82

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Solution

The fourth proportional to 21,398.22, 29,531.52 and 11,969.82 is: 16,519.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,398.22 : 29,531.52 = 11,969.82 : x
  2. Step 2: Convert to fraction form
    21,398.22/29,531.52 = 11,969.82/x
  3. Step 3: Cross multiply
    21,398.22x = 29,531.52 × 11,969.82
  4. Step 4: Simplify right side
    21,398.22x = 353,486,978.73
  5. Step 5: Solve for x
    x = 353,486,978.73/21,398.22
  6. Step 6: Final answer
    x = 16,519.46

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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.