Home / 7,821.71-11,734.09-3,439.15

Finding the Fourth Proportional to 7,821.71, 11,734.09 and 3,439.15

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Solution

The fourth proportional to 7,821.71, 11,734.09 and 3,439.15 is: 5,159.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,821.71 : 11,734.09 = 3,439.15 : x
  2. Step 2: Convert to fraction form
    7,821.71/11,734.09 = 3,439.15/x
  3. Step 3: Cross multiply
    7,821.71x = 11,734.09 × 3,439.15
  4. Step 4: Simplify right side
    7,821.71x = 40,355,295.62
  5. Step 5: Solve for x
    x = 40,355,295.62/7,821.71
  6. Step 6: Final answer
    x = 5,159.40

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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.