Home / 20,255.27-27,960.80-12,300.05

Finding the Fourth Proportional to 20,255.27, 27,960.80 and 12,300.05

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Solution

The fourth proportional to 20,255.27, 27,960.80 and 12,300.05 is: 16,979.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.27 : 27,960.80 = 12,300.05 : x
  2. Step 2: Convert to fraction form
    20,255.27/27,960.80 = 12,300.05/x
  3. Step 3: Cross multiply
    20,255.27x = 27,960.80 × 12,300.05
  4. Step 4: Simplify right side
    20,255.27x = 343,919,246.44
  5. Step 5: Solve for x
    x = 343,919,246.44/20,255.27
  6. Step 6: Final answer
    x = 16,979.25

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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.