Home / 21,539.49-29,724.33-11,979.46

Finding the Fourth Proportional to 21,539.49, 29,724.33 and 11,979.46

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Solution

The fourth proportional to 21,539.49, 29,724.33 and 11,979.46 is: 16,531.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.49 : 29,724.33 = 11,979.46 : x
  2. Step 2: Convert to fraction form
    21,539.49/29,724.33 = 11,979.46/x
  3. Step 3: Cross multiply
    21,539.49x = 29,724.33 × 11,979.46
  4. Step 4: Simplify right side
    21,539.49x = 356,081,422.26
  5. Step 5: Solve for x
    x = 356,081,422.26/21,539.49
  6. Step 6: Final answer
    x = 16,531.56

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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.