Home / 11,921.60-17,883.41-3,156.39

Finding the Fourth Proportional to 11,921.60, 17,883.41 and 3,156.39

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Solution

The fourth proportional to 11,921.60, 17,883.41 and 3,156.39 is: 4,734.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,921.60 : 17,883.41 = 3,156.39 : x
  2. Step 2: Convert to fraction form
    11,921.60/17,883.41 = 3,156.39/x
  3. Step 3: Cross multiply
    11,921.60x = 17,883.41 × 3,156.39
  4. Step 4: Simplify right side
    11,921.60x = 56,447,000.71
  5. Step 5: Solve for x
    x = 56,447,000.71/11,921.60
  6. Step 6: Final answer
    x = 4,734.85

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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.