Home / 18,805.20-28,218.60-7,126.80

Finding the Fourth Proportional to 18,805.20, 28,218.60 and 7,126.80

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Solution

The fourth proportional to 18,805.20, 28,218.60 and 7,126.80 is: 10,694.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.20 : 28,218.60 = 7,126.80 : x
  2. Step 2: Convert to fraction form
    18,805.20/28,218.60 = 7,126.80/x
  3. Step 3: Cross multiply
    18,805.20x = 28,218.60 × 7,126.80
  4. Step 4: Simplify right side
    18,805.20x = 201,108,318.48
  5. Step 5: Solve for x
    x = 201,108,318.48/18,805.20
  6. Step 6: Final answer
    x = 10,694.29

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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.