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Finding the Fourth Proportional to 18,863.84, 28,258.77 and 10,949.74

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Solution

The fourth proportional to 18,863.84, 28,258.77 and 10,949.74 is: 16,403.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863.84 : 28,258.77 = 10,949.74 : x
  2. Step 2: Convert to fraction form
    18,863.84/28,258.77 = 10,949.74/x
  3. Step 3: Cross multiply
    18,863.84x = 28,258.77 × 10,949.74
  4. Step 4: Simplify right side
    18,863.84x = 309,426,042.93
  5. Step 5: Solve for x
    x = 309,426,042.93/18,863.84
  6. Step 6: Final answer
    x = 16,403.13

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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.