Home / 8,142.12-12,214.94-2,519.78

Finding the Fourth Proportional to 8,142.12, 12,214.94 and 2,519.78

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Solution

The fourth proportional to 8,142.12, 12,214.94 and 2,519.78 is: 3,780.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,142.12 : 12,214.94 = 2,519.78 : x
  2. Step 2: Convert to fraction form
    8,142.12/12,214.94 = 2,519.78/x
  3. Step 3: Cross multiply
    8,142.12x = 12,214.94 × 2,519.78
  4. Step 4: Simplify right side
    8,142.12x = 30,778,887.84
  5. Step 5: Solve for x
    x = 30,778,887.84/8,142.12
  6. Step 6: Final answer
    x = 3,780.21

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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.