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Finding the Fourth Proportional to 18,963.56, 28,429.27 and 7,863.32

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Solution

The fourth proportional to 18,963.56, 28,429.27 and 7,863.32 is: 11,788.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.56 : 28,429.27 = 7,863.32 : x
  2. Step 2: Convert to fraction form
    18,963.56/28,429.27 = 7,863.32/x
  3. Step 3: Cross multiply
    18,963.56x = 28,429.27 × 7,863.32
  4. Step 4: Simplify right side
    18,963.56x = 223,548,447.38
  5. Step 5: Solve for x
    x = 223,548,447.38/18,963.56
  6. Step 6: Final answer
    x = 11,788.32

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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.