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Finding the Fourth Proportional to 12,122.28, 16,711.68 and 8,579.28

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Solution

The fourth proportional to 12,122.28, 16,711.68 and 8,579.28 is: 11,827.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.28 : 16,711.68 = 8,579.28 : x
  2. Step 2: Convert to fraction form
    12,122.28/16,711.68 = 8,579.28/x
  3. Step 3: Cross multiply
    12,122.28x = 16,711.68 × 8,579.28
  4. Step 4: Simplify right side
    12,122.28x = 143,374,181.99
  5. Step 5: Solve for x
    x = 143,374,181.99/12,122.28
  6. Step 6: Final answer
    x = 11,827.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.