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Finding the Fourth Proportional to 13,517.92, 18,645.18 and 7,928.92

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Solution

The fourth proportional to 13,517.92, 18,645.18 and 7,928.92 is: 10,936.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,517.92 : 18,645.18 = 7,928.92 : x
  2. Step 2: Convert to fraction form
    13,517.92/18,645.18 = 7,928.92/x
  3. Step 3: Cross multiply
    13,517.92x = 18,645.18 × 7,928.92
  4. Step 4: Simplify right side
    13,517.92x = 147,836,140.61
  5. Step 5: Solve for x
    x = 147,836,140.61/13,517.92
  6. Step 6: Final answer
    x = 10,936.31

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Double scale
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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.