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Finding the Fourth Proportional to 20,370.76, 30,559.74 and 7,230.76

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Solution

The fourth proportional to 20,370.76, 30,559.74 and 7,230.76 is: 10,847.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.76 : 30,559.74 = 7,230.76 : x
  2. Step 2: Convert to fraction form
    20,370.76/30,559.74 = 7,230.76/x
  3. Step 3: Cross multiply
    20,370.76x = 30,559.74 × 7,230.76
  4. Step 4: Simplify right side
    20,370.76x = 220,970,145.60
  5. Step 5: Solve for x
    x = 220,970,145.60/20,370.76
  6. Step 6: Final answer
    x = 10,847.42

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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.