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Finding the Fourth Proportional to 13,110.80, 18,081 and 8,632.89

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Solution

The fourth proportional to 13,110.80, 18,081 and 8,632.89 is: 11,905.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,110.80 : 18,081 = 8,632.89 : x
  2. Step 2: Convert to fraction form
    13,110.80/18,081 = 8,632.89/x
  3. Step 3: Cross multiply
    13,110.80x = 18,081 × 8,632.89
  4. Step 4: Simplify right side
    13,110.80x = 156,091,284.09
  5. Step 5: Solve for x
    x = 156,091,284.09/13,110.80
  6. Step 6: Final answer
    x = 11,905.55

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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.