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Finding the Fourth Proportional to 18,863.59, 28,258.40 and 10,949.49

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Solution

The fourth proportional to 18,863.59, 28,258.40 and 10,949.49 is: 16,402.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.59 : 28,258.40 = 10,949.49 : x
  2. Step 2: Convert to fraction form
    18,863.59/28,258.40 = 10,949.49/x
  3. Step 3: Cross multiply
    18,863.59x = 28,258.40 × 10,949.49
  4. Step 4: Simplify right side
    18,863.59x = 309,414,872.18
  5. Step 5: Solve for x
    x = 309,414,872.18/18,863.59
  6. Step 6: Final answer
    x = 16,402.76

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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.