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Finding the Fourth Proportional to 20,350.60, 30,525.90 and 12,574.60

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Solution

The fourth proportional to 20,350.60, 30,525.90 and 12,574.60 is: 18,861.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,350.60 : 30,525.90 = 12,574.60 : x
  2. Step 2: Convert to fraction form
    20,350.60/30,525.90 = 12,574.60/x
  3. Step 3: Cross multiply
    20,350.60x = 30,525.90 × 12,574.60
  4. Step 4: Simplify right side
    20,350.60x = 383,850,982.14
  5. Step 5: Solve for x
    x = 383,850,982.14/20,350.60
  6. Step 6: Final answer
    x = 18,861.90

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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.