Home / 19,808.28-29,711.81-8,112.69

Finding the Fourth Proportional to 19,808.28, 29,711.81 and 8,112.69

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Solution

The fourth proportional to 19,808.28, 29,711.81 and 8,112.69 is: 12,168.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,808.28 : 29,711.81 = 8,112.69 : x
  2. Step 2: Convert to fraction form
    19,808.28/29,711.81 = 8,112.69/x
  3. Step 3: Cross multiply
    19,808.28x = 29,711.81 × 8,112.69
  4. Step 4: Simplify right side
    19,808.28x = 241,042,703.87
  5. Step 5: Solve for x
    x = 241,042,703.87/19,808.28
  6. Step 6: Final answer
    x = 12,168.79

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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.