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Finding the Fourth Proportional to 26,890.30, 40,330.05 and 12,850.30

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Solution

The fourth proportional to 26,890.30, 40,330.05 and 12,850.30 is: 19,272.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,890.30 : 40,330.05 = 12,850.30 : x
  2. Step 2: Convert to fraction form
    26,890.30/40,330.05 = 12,850.30/x
  3. Step 3: Cross multiply
    26,890.30x = 40,330.05 × 12,850.30
  4. Step 4: Simplify right side
    26,890.30x = 518,253,241.52
  5. Step 5: Solve for x
    x = 518,253,241.52/26,890.30
  6. Step 6: Final answer
    x = 19,272.87

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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.