Home / 20,425.44-30,640.80-7,281.60

Finding the Fourth Proportional to 20,425.44, 30,640.80 and 7,281.60

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Solution

The fourth proportional to 20,425.44, 30,640.80 and 7,281.60 is: 10,923.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.44 : 30,640.80 = 7,281.60 : x
  2. Step 2: Convert to fraction form
    20,425.44/30,640.80 = 7,281.60/x
  3. Step 3: Cross multiply
    20,425.44x = 30,640.80 × 7,281.60
  4. Step 4: Simplify right side
    20,425.44x = 223,114,049.28
  5. Step 5: Solve for x
    x = 223,114,049.28/20,425.44
  6. Step 6: Final answer
    x = 10,923.34

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Similar ratio
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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.