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Finding the Fourth Proportional to 13,632.62, 18,808.11 and 8,919.63

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Solution

The fourth proportional to 13,632.62, 18,808.11 and 8,919.63 is: 12,305.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.62 : 18,808.11 = 8,919.63 : x
  2. Step 2: Convert to fraction form
    13,632.62/18,808.11 = 8,919.63/x
  3. Step 3: Cross multiply
    13,632.62x = 18,808.11 × 8,919.63
  4. Step 4: Simplify right side
    13,632.62x = 167,761,382.20
  5. Step 5: Solve for x
    x = 167,761,382.20/13,632.62
  6. Step 6: Final answer
    x = 12,305.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.