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Finding the Fourth Proportional to 28,004.08, 42,006.09 and 8,281.09

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Solution

The fourth proportional to 28,004.08, 42,006.09 and 8,281.09 is: 12,421.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.08 : 42,006.09 = 8,281.09 : x
  2. Step 2: Convert to fraction form
    28,004.08/42,006.09 = 8,281.09/x
  3. Step 3: Cross multiply
    28,004.08x = 42,006.09 × 8,281.09
  4. Step 4: Simplify right side
    28,004.08x = 347,856,059.12
  5. Step 5: Solve for x
    x = 347,856,059.12/28,004.08
  6. Step 6: Final answer
    x = 12,421.62

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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.