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Finding the Fourth Proportional to 18,826.20, 28,246.74 and 8,969.88

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Solution

The fourth proportional to 18,826.20, 28,246.74 and 8,969.88 is: 13,458.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,826.20 : 28,246.74 = 8,969.88 : x
  2. Step 2: Convert to fraction form
    18,826.20/28,246.74 = 8,969.88/x
  3. Step 3: Cross multiply
    18,826.20x = 28,246.74 × 8,969.88
  4. Step 4: Simplify right side
    18,826.20x = 253,369,868.19
  5. Step 5: Solve for x
    x = 253,369,868.19/18,826.20
  6. Step 6: Final answer
    x = 13,458.36

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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.