Home / 16,811.64-25,221.30-5,125.80

Finding the Fourth Proportional to 16,811.64, 25,221.30 and 5,125.80

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Solution

The fourth proportional to 16,811.64, 25,221.30 and 5,125.80 is: 7,689.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,811.64 : 25,221.30 = 5,125.80 : x
  2. Step 2: Convert to fraction form
    16,811.64/25,221.30 = 5,125.80/x
  3. Step 3: Cross multiply
    16,811.64x = 25,221.30 × 5,125.80
  4. Step 4: Simplify right side
    16,811.64x = 129,279,339.54
  5. Step 5: Solve for x
    x = 129,279,339.54/16,811.64
  6. Step 6: Final answer
    x = 7,689.87

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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.