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Finding the Fourth Proportional to 12,954.58, 19,431.88 and 5,168.86

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Solution

The fourth proportional to 12,954.58, 19,431.88 and 5,168.86 is: 7,753.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,954.58 : 19,431.88 = 5,168.86 : x
  2. Step 2: Convert to fraction form
    12,954.58/19,431.88 = 5,168.86/x
  3. Step 3: Cross multiply
    12,954.58x = 19,431.88 × 5,168.86
  4. Step 4: Simplify right side
    12,954.58x = 100,440,667.26
  5. Step 5: Solve for x
    x = 100,440,667.26/12,954.58
  6. Step 6: Final answer
    x = 7,753.29

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Similar ratio
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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.