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Finding the Fourth Proportional to 18,838.94, 28,258.42 and 13,677.62

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Solution

The fourth proportional to 18,838.94, 28,258.42 and 13,677.62 is: 20,516.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,838.94 : 28,258.42 = 13,677.62 : x
  2. Step 2: Convert to fraction form
    18,838.94/28,258.42 = 13,677.62/x
  3. Step 3: Cross multiply
    18,838.94x = 28,258.42 × 13,677.62
  4. Step 4: Simplify right side
    18,838.94x = 386,507,930.56
  5. Step 5: Solve for x
    x = 386,507,930.56/18,838.94
  6. Step 6: Final answer
    x = 20,516.44

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.