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Finding the Fourth Proportional to 13,761.76, 20,631.12 and 5,551.84

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Solution

The fourth proportional to 13,761.76, 20,631.12 and 5,551.84 is: 8,323.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,761.76 : 20,631.12 = 5,551.84 : x
  2. Step 2: Convert to fraction form
    13,761.76/20,631.12 = 5,551.84/x
  3. Step 3: Cross multiply
    13,761.76x = 20,631.12 × 5,551.84
  4. Step 4: Simplify right side
    13,761.76x = 114,540,677.26
  5. Step 5: Solve for x
    x = 114,540,677.26/13,761.76
  6. Step 6: Final answer
    x = 8,323.11

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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.