Home / 12,806.34-19,211.71-3,921.45

Finding the Fourth Proportional to 12,806.34, 19,211.71 and 3,921.45

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Solution

The fourth proportional to 12,806.34, 19,211.71 and 3,921.45 is: 5,882.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,806.34 : 19,211.71 = 3,921.45 : x
  2. Step 2: Convert to fraction form
    12,806.34/19,211.71 = 3,921.45/x
  3. Step 3: Cross multiply
    12,806.34x = 19,211.71 × 3,921.45
  4. Step 4: Simplify right side
    12,806.34x = 75,337,674.66
  5. Step 5: Solve for x
    x = 75,337,674.66/12,806.34
  6. Step 6: Final answer
    x = 5,882.84

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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.