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Finding the Fourth Proportional to 13,486.97, 18,612.18 and 7,745.33

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Solution

The fourth proportional to 13,486.97, 18,612.18 and 7,745.33 is: 10,688.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,486.97 : 18,612.18 = 7,745.33 : x
  2. Step 2: Convert to fraction form
    13,486.97/18,612.18 = 7,745.33/x
  3. Step 3: Cross multiply
    13,486.97x = 18,612.18 × 7,745.33
  4. Step 4: Simplify right side
    13,486.97x = 144,157,383.06
  5. Step 5: Solve for x
    x = 144,157,383.06/13,486.97
  6. Step 6: Final answer
    x = 10,688.65

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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.