Home / 8,139.79-12,201.38-3,207.43

Finding the Fourth Proportional to 8,139.79, 12,201.38 and 3,207.43

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Solution

The fourth proportional to 8,139.79, 12,201.38 and 3,207.43 is: 4,807.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.79 : 12,201.38 = 3,207.43 : x
  2. Step 2: Convert to fraction form
    8,139.79/12,201.38 = 3,207.43/x
  3. Step 3: Cross multiply
    8,139.79x = 12,201.38 × 3,207.43
  4. Step 4: Simplify right side
    8,139.79x = 39,134,995.21
  5. Step 5: Solve for x
    x = 39,134,995.21/8,139.79
  6. Step 6: Final answer
    x = 4,807.87

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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.