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Finding the Fourth Proportional to 25,871.80, 38,811.30 and 11,080.60

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Solution

The fourth proportional to 25,871.80, 38,811.30 and 11,080.60 is: 16,622.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,871.80 : 38,811.30 = 11,080.60 : x
  2. Step 2: Convert to fraction form
    25,871.80/38,811.30 = 11,080.60/x
  3. Step 3: Cross multiply
    25,871.80x = 38,811.30 × 11,080.60
  4. Step 4: Simplify right side
    25,871.80x = 430,052,490.78
  5. Step 5: Solve for x
    x = 430,052,490.78/25,871.80
  6. Step 6: Final answer
    x = 16,622.44

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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.