Home / 8,520.09-12,775.81-3,899.13

Finding the Fourth Proportional to 8,520.09, 12,775.81 and 3,899.13

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Solution

The fourth proportional to 8,520.09, 12,775.81 and 3,899.13 is: 5,846.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520.09 : 12,775.81 = 3,899.13 : x
  2. Step 2: Convert to fraction form
    8,520.09/12,775.81 = 3,899.13/x
  3. Step 3: Cross multiply
    8,520.09x = 12,775.81 × 3,899.13
  4. Step 4: Simplify right side
    8,520.09x = 49,814,460.67
  5. Step 5: Solve for x
    x = 49,814,460.67/8,520.09
  6. Step 6: Final answer
    x = 5,846.71

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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.