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Finding the Fourth Proportional to 40,393, 60,599.34 and 12,691

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Solution

The fourth proportional to 40,393, 60,599.34 and 12,691 is: 19,039.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,393 : 60,599.34 = 12,691 : x
  2. Step 2: Convert to fraction form
    40,393/60,599.34 = 12,691/x
  3. Step 3: Cross multiply
    40,393x = 60,599.34 × 12,691
  4. Step 4: Simplify right side
    40,393x = 769,066,223.94
  5. Step 5: Solve for x
    x = 769,066,223.94/40,393
  6. Step 6: Final answer
    x = 19,039.59

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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.