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Finding the Fourth Proportional to 18,912.92, 26,091.60 and 13,248.62

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Solution

The fourth proportional to 18,912.92, 26,091.60 and 13,248.62 is: 18,277.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,912.92 : 26,091.60 = 13,248.62 : x
  2. Step 2: Convert to fraction form
    18,912.92/26,091.60 = 13,248.62/x
  3. Step 3: Cross multiply
    18,912.92x = 26,091.60 × 13,248.62
  4. Step 4: Simplify right side
    18,912.92x = 345,677,693.59
  5. Step 5: Solve for x
    x = 345,677,693.59/18,912.92
  6. Step 6: Final answer
    x = 18,277.33

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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.