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Finding the Fourth Proportional to 40,338, 60,521.58 and 12,636

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Solution

The fourth proportional to 40,338, 60,521.58 and 12,636 is: 18,958.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,338 : 60,521.58 = 12,636 : x
  2. Step 2: Convert to fraction form
    40,338/60,521.58 = 12,636/x
  3. Step 3: Cross multiply
    40,338x = 60,521.58 × 12,636
  4. Step 4: Simplify right side
    40,338x = 764,750,684.88
  5. Step 5: Solve for x
    x = 764,750,684.88/40,338
  6. Step 6: Final answer
    x = 18,958.57

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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.