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Finding the Fourth Proportional to 18,906.62, 28,202.28 and 18,258.72

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Solution

The fourth proportional to 18,906.62, 28,202.28 and 18,258.72 is: 27,235.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.62 : 28,202.28 = 18,258.72 : x
  2. Step 2: Convert to fraction form
    18,906.62/28,202.28 = 18,258.72/x
  3. Step 3: Cross multiply
    18,906.62x = 28,202.28 × 18,258.72
  4. Step 4: Simplify right side
    18,906.62x = 514,937,359.65
  5. Step 5: Solve for x
    x = 514,937,359.65/18,906.62
  6. Step 6: Final answer
    x = 27,235.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.