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Finding the Fourth Proportional to 13,538, 20,307 and 5,335.76

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Solution

The fourth proportional to 13,538, 20,307 and 5,335.76 is: 8,003.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,538 : 20,307 = 5,335.76 : x
  2. Step 2: Convert to fraction form
    13,538/20,307 = 5,335.76/x
  3. Step 3: Cross multiply
    13,538x = 20,307 × 5,335.76
  4. Step 4: Simplify right side
    13,538x = 108,353,278.32
  5. Step 5: Solve for x
    x = 108,353,278.32/13,538
  6. Step 6: Final answer
    x = 8,003.64

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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.