Home / 21,016.80-28,975.46-16,979.09

Finding the Fourth Proportional to 21,016.80, 28,975.46 and 16,979.09

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Solution

The fourth proportional to 21,016.80, 28,975.46 and 16,979.09 is: 23,408.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,016.80 : 28,975.46 = 16,979.09 : x
  2. Step 2: Convert to fraction form
    21,016.80/28,975.46 = 16,979.09/x
  3. Step 3: Cross multiply
    21,016.80x = 28,975.46 × 16,979.09
  4. Step 4: Simplify right side
    21,016.80x = 491,976,713.36
  5. Step 5: Solve for x
    x = 491,976,713.36/21,016.80
  6. Step 6: Final answer
    x = 23,408.74

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1.5x scale

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.