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Finding the Fourth Proportional to 13,102.75, 18,093.03 and 12,679.09

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Solution

The fourth proportional to 13,102.75, 18,093.03 and 12,679.09 is: 17,508.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,102.75 : 18,093.03 = 12,679.09 : x
  2. Step 2: Convert to fraction form
    13,102.75/18,093.03 = 12,679.09/x
  3. Step 3: Cross multiply
    13,102.75x = 18,093.03 × 12,679.09
  4. Step 4: Simplify right side
    13,102.75x = 229,403,110.51
  5. Step 5: Solve for x
    x = 229,403,110.51/13,102.75
  6. Step 6: Final answer
    x = 17,508.02

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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.