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Finding the Fourth Proportional to 15,796.36, 21,799.20 and 8,722.90

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Solution

The fourth proportional to 15,796.36, 21,799.20 and 8,722.90 is: 12,037.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,796.36 : 21,799.20 = 8,722.90 : x
  2. Step 2: Convert to fraction form
    15,796.36/21,799.20 = 8,722.90/x
  3. Step 3: Cross multiply
    15,796.36x = 21,799.20 × 8,722.90
  4. Step 4: Simplify right side
    15,796.36x = 190,152,241.68
  5. Step 5: Solve for x
    x = 190,152,241.68/15,796.36
  6. Step 6: Final answer
    x = 12,037.73

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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.