Home / 20,979.65-28,952.62-11,419.88

Finding the Fourth Proportional to 20,979.65, 28,952.62 and 11,419.88

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Solution

The fourth proportional to 20,979.65, 28,952.62 and 11,419.88 is: 15,759.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.65 : 28,952.62 = 11,419.88 : x
  2. Step 2: Convert to fraction form
    20,979.65/28,952.62 = 11,419.88/x
  3. Step 3: Cross multiply
    20,979.65x = 28,952.62 × 11,419.88
  4. Step 4: Simplify right side
    20,979.65x = 330,635,446.09
  5. Step 5: Solve for x
    x = 330,635,446.09/20,979.65
  6. Step 6: Final answer
    x = 15,759.82

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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.