Home / 8,111.60-12,158.40-3,179.60

Finding the Fourth Proportional to 8,111.60, 12,158.40 and 3,179.60

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Solution

The fourth proportional to 8,111.60, 12,158.40 and 3,179.60 is: 4,765.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,111.60 : 12,158.40 = 3,179.60 : x
  2. Step 2: Convert to fraction form
    8,111.60/12,158.40 = 3,179.60/x
  3. Step 3: Cross multiply
    8,111.60x = 12,158.40 × 3,179.60
  4. Step 4: Simplify right side
    8,111.60x = 38,658,848.64
  5. Step 5: Solve for x
    x = 38,658,848.64/8,111.60
  6. Step 6: Final answer
    x = 4,765.87

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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.