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Finding the Fourth Proportional to 13,197, 19,770.78 and 6,615.48

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Solution

The fourth proportional to 13,197, 19,770.78 and 6,615.48 is: 9,910.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,197 : 19,770.78 = 6,615.48 : x
  2. Step 2: Convert to fraction form
    13,197/19,770.78 = 6,615.48/x
  3. Step 3: Cross multiply
    13,197x = 19,770.78 × 6,615.48
  4. Step 4: Simplify right side
    13,197x = 130,793,199.67
  5. Step 5: Solve for x
    x = 130,793,199.67/13,197
  6. Step 6: Final answer
    x = 9,910.83

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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.