Home / 10,961.60-16,442.40-3,171.20

Finding the Fourth Proportional to 10,961.60, 16,442.40 and 3,171.20

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Solution

The fourth proportional to 10,961.60, 16,442.40 and 3,171.20 is: 4,756.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,961.60 : 16,442.40 = 3,171.20 : x
  2. Step 2: Convert to fraction form
    10,961.60/16,442.40 = 3,171.20/x
  3. Step 3: Cross multiply
    10,961.60x = 16,442.40 × 3,171.20
  4. Step 4: Simplify right side
    10,961.60x = 52,142,138.88
  5. Step 5: Solve for x
    x = 52,142,138.88/10,961.60
  6. Step 6: Final answer
    x = 4,756.80

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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.