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Finding the Fourth Proportional to 12,158.68, 18,238.04 and 6,960.96

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Solution

The fourth proportional to 12,158.68, 18,238.04 and 6,960.96 is: 10,441.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,158.68 : 18,238.04 = 6,960.96 : x
  2. Step 2: Convert to fraction form
    12,158.68/18,238.04 = 6,960.96/x
  3. Step 3: Cross multiply
    12,158.68x = 18,238.04 × 6,960.96
  4. Step 4: Simplify right side
    12,158.68x = 126,954,266.92
  5. Step 5: Solve for x
    x = 126,954,266.92/12,158.68
  6. Step 6: Final answer
    x = 10,441.45

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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.