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Finding the Fourth Proportional to 15,086.52, 20,819.09 and 8,372.10

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Solution

The fourth proportional to 15,086.52, 20,819.09 and 8,372.10 is: 11,553.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,086.52 : 20,819.09 = 8,372.10 : x
  2. Step 2: Convert to fraction form
    15,086.52/20,819.09 = 8,372.10/x
  3. Step 3: Cross multiply
    15,086.52x = 20,819.09 × 8,372.10
  4. Step 4: Simplify right side
    15,086.52x = 174,299,461.53
  5. Step 5: Solve for x
    x = 174,299,461.53/15,086.52
  6. Step 6: Final answer
    x = 11,553.32

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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.