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Finding the Fourth Proportional to 18,751.64, 28,141.31 and 8,890.96

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Solution

The fourth proportional to 18,751.64, 28,141.31 and 8,890.96 is: 13,343.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.64 : 28,141.31 = 8,890.96 : x
  2. Step 2: Convert to fraction form
    18,751.64/28,141.31 = 8,890.96/x
  3. Step 3: Cross multiply
    18,751.64x = 28,141.31 × 8,890.96
  4. Step 4: Simplify right side
    18,751.64x = 250,203,146.75
  5. Step 5: Solve for x
    x = 250,203,146.75/18,751.64
  6. Step 6: Final answer
    x = 13,343.00

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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.