Home / 19,811.28-29,716.30-8,115.70

Finding the Fourth Proportional to 19,811.28, 29,716.30 and 8,115.70

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Solution

The fourth proportional to 19,811.28, 29,716.30 and 8,115.70 is: 12,173.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,811.28 : 29,716.30 = 8,115.70 : x
  2. Step 2: Convert to fraction form
    19,811.28/29,716.30 = 8,115.70/x
  3. Step 3: Cross multiply
    19,811.28x = 29,716.30 × 8,115.70
  4. Step 4: Simplify right side
    19,811.28x = 241,168,575.91
  5. Step 5: Solve for x
    x = 241,168,575.91/19,811.28
  6. Step 6: Final answer
    x = 12,173.30

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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.