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Finding the Fourth Proportional to 15,193.18, 20,967.09 and 8,819.26

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Solution

The fourth proportional to 15,193.18, 20,967.09 and 8,819.26 is: 12,170.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,193.18 : 20,967.09 = 8,819.26 : x
  2. Step 2: Convert to fraction form
    15,193.18/20,967.09 = 8,819.26/x
  3. Step 3: Cross multiply
    15,193.18x = 20,967.09 × 8,819.26
  4. Step 4: Simplify right side
    15,193.18x = 184,914,218.15
  5. Step 5: Solve for x
    x = 184,914,218.15/15,193.18
  6. Step 6: Final answer
    x = 12,170.87

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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.