Home / 8,135.92-12,210.90-3,979

Finding the Fourth Proportional to 8,135.92, 12,210.90 and 3,979

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Solution

The fourth proportional to 8,135.92, 12,210.90 and 3,979 is: 5,971.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,135.92 : 12,210.90 = 3,979 : x
  2. Step 2: Convert to fraction form
    8,135.92/12,210.90 = 3,979/x
  3. Step 3: Cross multiply
    8,135.92x = 12,210.90 × 3,979
  4. Step 4: Simplify right side
    8,135.92x = 48,587,171.10
  5. Step 5: Solve for x
    x = 48,587,171.10/8,135.92
  6. Step 6: Final answer
    x = 5,971.93

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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.