Home / 8,108.40-12,162.60-3,181.56

Finding the Fourth Proportional to 8,108.40, 12,162.60 and 3,181.56

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Solution

The fourth proportional to 8,108.40, 12,162.60 and 3,181.56 is: 4,772.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,108.40 : 12,162.60 = 3,181.56 : x
  2. Step 2: Convert to fraction form
    8,108.40/12,162.60 = 3,181.56/x
  3. Step 3: Cross multiply
    8,108.40x = 12,162.60 × 3,181.56
  4. Step 4: Simplify right side
    8,108.40x = 38,696,041.66
  5. Step 5: Solve for x
    x = 38,696,041.66/8,108.40
  6. Step 6: Final answer
    x = 4,772.34

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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.