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Finding the Fourth Proportional to 13,091.88, 18,072.06 and 8,902.68

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Solution

The fourth proportional to 13,091.88, 18,072.06 and 8,902.68 is: 12,289.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,091.88 : 18,072.06 = 8,902.68 : x
  2. Step 2: Convert to fraction form
    13,091.88/18,072.06 = 8,902.68/x
  3. Step 3: Cross multiply
    13,091.88x = 18,072.06 × 8,902.68
  4. Step 4: Simplify right side
    13,091.88x = 160,889,767.12
  5. Step 5: Solve for x
    x = 160,889,767.12/13,091.88
  6. Step 6: Final answer
    x = 12,289.28

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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.