Home / 20,126.10-30,189.15-6,979.80

Finding the Fourth Proportional to 20,126.10, 30,189.15 and 6,979.80

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Solution

The fourth proportional to 20,126.10, 30,189.15 and 6,979.80 is: 10,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,126.10 : 30,189.15 = 6,979.80 : x
  2. Step 2: Convert to fraction form
    20,126.10/30,189.15 = 6,979.80/x
  3. Step 3: Cross multiply
    20,126.10x = 30,189.15 × 6,979.80
  4. Step 4: Simplify right side
    20,126.10x = 210,714,229.17
  5. Step 5: Solve for x
    x = 210,714,229.17/20,126.10
  6. Step 6: Final answer
    x = 10,469.70

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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.