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Finding the Fourth Proportional to 13,871.56, 20,795.82 and 6,472.12

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Solution

The fourth proportional to 13,871.56, 20,795.82 and 6,472.12 is: 9,702.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,871.56 : 20,795.82 = 6,472.12 : x
  2. Step 2: Convert to fraction form
    13,871.56/20,795.82 = 6,472.12/x
  3. Step 3: Cross multiply
    13,871.56x = 20,795.82 × 6,472.12
  4. Step 4: Simplify right side
    13,871.56x = 134,593,042.54
  5. Step 5: Solve for x
    x = 134,593,042.54/13,871.56
  6. Step 6: Final answer
    x = 9,702.81

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1.5x scale

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.