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Finding the Fourth Proportional to 10,991.64, 16,485.84 and 3,596.88

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Solution

The fourth proportional to 10,991.64, 16,485.84 and 3,596.88 is: 5,394.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.64 : 16,485.84 = 3,596.88 : x
  2. Step 2: Convert to fraction form
    10,991.64/16,485.84 = 3,596.88/x
  3. Step 3: Cross multiply
    10,991.64x = 16,485.84 × 3,596.88
  4. Step 4: Simplify right side
    10,991.64x = 59,297,588.18
  5. Step 5: Solve for x
    x = 59,297,588.18/10,991.64
  6. Step 6: Final answer
    x = 5,394.79

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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.