Home / 20,623.90-30,942.03-8,145.70

Finding the Fourth Proportional to 20,623.90, 30,942.03 and 8,145.70

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Solution

The fourth proportional to 20,623.90, 30,942.03 and 8,145.70 is: 12,220.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,623.90 : 30,942.03 = 8,145.70 : x
  2. Step 2: Convert to fraction form
    20,623.90/30,942.03 = 8,145.70/x
  3. Step 3: Cross multiply
    20,623.90x = 30,942.03 × 8,145.70
  4. Step 4: Simplify right side
    20,623.90x = 252,044,493.77
  5. Step 5: Solve for x
    x = 252,044,493.77/20,623.90
  6. Step 6: Final answer
    x = 12,220.99

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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.