Home / 20,178.20-30,279.45-7,039.80

Finding the Fourth Proportional to 20,178.20, 30,279.45 and 7,039.80

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Solution

The fourth proportional to 20,178.20, 30,279.45 and 7,039.80 is: 10,563.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.20 : 30,279.45 = 7,039.80 : x
  2. Step 2: Convert to fraction form
    20,178.20/30,279.45 = 7,039.80/x
  3. Step 3: Cross multiply
    20,178.20x = 30,279.45 × 7,039.80
  4. Step 4: Simplify right side
    20,178.20x = 213,161,272.11
  5. Step 5: Solve for x
    x = 213,161,272.11/20,178.20
  6. Step 6: Final answer
    x = 10,563.94

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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.