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Finding the Fourth Proportional to 18,800.96, 28,215.60 and 12,863.64

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Solution

The fourth proportional to 18,800.96, 28,215.60 and 12,863.64 is: 19,305.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,800.96 : 28,215.60 = 12,863.64 : x
  2. Step 2: Convert to fraction form
    18,800.96/28,215.60 = 12,863.64/x
  3. Step 3: Cross multiply
    18,800.96x = 28,215.60 × 12,863.64
  4. Step 4: Simplify right side
    18,800.96x = 362,955,320.78
  5. Step 5: Solve for x
    x = 362,955,320.78/18,800.96
  6. Step 6: Final answer
    x = 19,305.15

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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.