Home / 20,180.40-30,279.60-7,042.20

Finding the Fourth Proportional to 20,180.40, 30,279.60 and 7,042.20

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Solution

The fourth proportional to 20,180.40, 30,279.60 and 7,042.20 is: 10,566.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,180.40 : 30,279.60 = 7,042.20 : x
  2. Step 2: Convert to fraction form
    20,180.40/30,279.60 = 7,042.20/x
  3. Step 3: Cross multiply
    20,180.40x = 30,279.60 × 7,042.20
  4. Step 4: Simplify right side
    20,180.40x = 213,234,999.12
  5. Step 5: Solve for x
    x = 213,234,999.12/20,180.40
  6. Step 6: Final answer
    x = 10,566.44

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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.