Home / 20,286.20-30,458.10-12,510.20

Finding the Fourth Proportional to 20,286.20, 30,458.10 and 12,510.20

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Solution

The fourth proportional to 20,286.20, 30,458.10 and 12,510.20 is: 18,783.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.20 : 30,458.10 = 12,510.20 : x
  2. Step 2: Convert to fraction form
    20,286.20/30,458.10 = 12,510.20/x
  3. Step 3: Cross multiply
    20,286.20x = 30,458.10 × 12,510.20
  4. Step 4: Simplify right side
    20,286.20x = 381,036,922.62
  5. Step 5: Solve for x
    x = 381,036,922.62/20,286.20
  6. Step 6: Final answer
    x = 18,783.06

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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.