Home / 19,961.64-29,942.01-8,115.39

Finding the Fourth Proportional to 19,961.64, 29,942.01 and 8,115.39

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Solution

The fourth proportional to 19,961.64, 29,942.01 and 8,115.39 is: 12,172.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,961.64 : 29,942.01 = 8,115.39 : x
  2. Step 2: Convert to fraction form
    19,961.64/29,942.01 = 8,115.39/x
  3. Step 3: Cross multiply
    19,961.64x = 29,942.01 × 8,115.39
  4. Step 4: Simplify right side
    19,961.64x = 242,991,088.53
  5. Step 5: Solve for x
    x = 242,991,088.53/19,961.64
  6. Step 6: Final answer
    x = 12,172.90

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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.