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Finding the Fourth Proportional to 40,906.87, 61,361.07 and 12,826.30

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Solution

The fourth proportional to 40,906.87, 61,361.07 and 12,826.30 is: 19,239.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,906.87 : 61,361.07 = 12,826.30 : x
  2. Step 2: Convert to fraction form
    40,906.87/61,361.07 = 12,826.30/x
  3. Step 3: Cross multiply
    40,906.87x = 61,361.07 × 12,826.30
  4. Step 4: Simplify right side
    40,906.87x = 787,035,492.14
  5. Step 5: Solve for x
    x = 787,035,492.14/40,906.87
  6. Step 6: Final answer
    x = 19,239.69

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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.