Home / 21,722.27-29,979.56-12,165.80

Finding the Fourth Proportional to 21,722.27, 29,979.56 and 12,165.80

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Solution

The fourth proportional to 21,722.27, 29,979.56 and 12,165.80 is: 16,790.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.27 : 29,979.56 = 12,165.80 : x
  2. Step 2: Convert to fraction form
    21,722.27/29,979.56 = 12,165.80/x
  3. Step 3: Cross multiply
    21,722.27x = 29,979.56 × 12,165.80
  4. Step 4: Simplify right side
    21,722.27x = 364,725,120.32
  5. Step 5: Solve for x
    x = 364,725,120.32/21,722.27
  6. Step 6: Final answer
    x = 16,790.38

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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.