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Finding the Fourth Proportional to 28,414.56, 42,623.82 and 8,691.60

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Solution

The fourth proportional to 28,414.56, 42,623.82 and 8,691.60 is: 13,038.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,414.56 : 42,623.82 = 8,691.60 : x
  2. Step 2: Convert to fraction form
    28,414.56/42,623.82 = 8,691.60/x
  3. Step 3: Cross multiply
    28,414.56x = 42,623.82 × 8,691.60
  4. Step 4: Simplify right side
    28,414.56x = 370,469,193.91
  5. Step 5: Solve for x
    x = 370,469,193.91/28,414.56
  6. Step 6: Final answer
    x = 13,038.01

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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.