Home / 20,339.80-30,514.29-10,979.61

Finding the Fourth Proportional to 20,339.80, 30,514.29 and 10,979.61

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Solution

The fourth proportional to 20,339.80, 30,514.29 and 10,979.61 is: 16,471.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,339.80 : 30,514.29 = 10,979.61 : x
  2. Step 2: Convert to fraction form
    20,339.80/30,514.29 = 10,979.61/x
  3. Step 3: Cross multiply
    20,339.80x = 30,514.29 × 10,979.61
  4. Step 4: Simplify right side
    20,339.80x = 335,035,155.22
  5. Step 5: Solve for x
    x = 335,035,155.22/20,339.80
  6. Step 6: Final answer
    x = 16,471.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.