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Finding the Fourth Proportional to 16,811.80, 25,188.90 and 10,965.40

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Solution

The fourth proportional to 16,811.80, 25,188.90 and 10,965.40 is: 16,429.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,811.80 : 25,188.90 = 10,965.40 : x
  2. Step 2: Convert to fraction form
    16,811.80/25,188.90 = 10,965.40/x
  3. Step 3: Cross multiply
    16,811.80x = 25,188.90 × 10,965.40
  4. Step 4: Simplify right side
    16,811.80x = 276,206,364.06
  5. Step 5: Solve for x
    x = 276,206,364.06/16,811.80
  6. Step 6: Final answer
    x = 16,429.32

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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.