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Finding the Fourth Proportional to 40,958.09, 61,437.09 and 12,880.61

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Solution

The fourth proportional to 40,958.09, 61,437.09 and 12,880.61 is: 19,320.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,958.09 : 61,437.09 = 12,880.61 : x
  2. Step 2: Convert to fraction form
    40,958.09/61,437.09 = 12,880.61/x
  3. Step 3: Cross multiply
    40,958.09x = 61,437.09 × 12,880.61
  4. Step 4: Simplify right side
    40,958.09x = 791,347,195.82
  5. Step 5: Solve for x
    x = 791,347,195.82/40,958.09
  6. Step 6: Final answer
    x = 19,320.90

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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.