Home / 20,678.02-30,998.82-8,206.80

Finding the Fourth Proportional to 20,678.02, 30,998.82 and 8,206.80

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Solution

The fourth proportional to 20,678.02, 30,998.82 and 8,206.80 is: 12,302.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.02 : 30,998.82 = 8,206.80 : x
  2. Step 2: Convert to fraction form
    20,678.02/30,998.82 = 8,206.80/x
  3. Step 3: Cross multiply
    20,678.02x = 30,998.82 × 8,206.80
  4. Step 4: Simplify right side
    20,678.02x = 254,401,115.98
  5. Step 5: Solve for x
    x = 254,401,115.98/20,678.02
  6. Step 6: Final answer
    x = 12,302.97

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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.