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Finding the Fourth Proportional to 20,019.20, 30,025.60 and 8,330.56

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Solution

The fourth proportional to 20,019.20, 30,025.60 and 8,330.56 is: 12,494.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,019.20 : 30,025.60 = 8,330.56 : x
  2. Step 2: Convert to fraction form
    20,019.20/30,025.60 = 8,330.56/x
  3. Step 3: Cross multiply
    20,019.20x = 30,025.60 × 8,330.56
  4. Step 4: Simplify right side
    20,019.20x = 250,130,062.34
  5. Step 5: Solve for x
    x = 250,130,062.34/20,019.20
  6. Step 6: Final answer
    x = 12,494.51

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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.