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Finding the Fourth Proportional to 14,059.28, 21,078.41 and 8,511.28

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Solution

The fourth proportional to 14,059.28, 21,078.41 and 8,511.28 is: 12,760.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,059.28 : 21,078.41 = 8,511.28 : x
  2. Step 2: Convert to fraction form
    14,059.28/21,078.41 = 8,511.28/x
  3. Step 3: Cross multiply
    14,059.28x = 21,078.41 × 8,511.28
  4. Step 4: Simplify right side
    14,059.28x = 179,404,320.65
  5. Step 5: Solve for x
    x = 179,404,320.65/14,059.28
  6. Step 6: Final answer
    x = 12,760.57

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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.