Home / 8,429.31-12,640.67-3,161.45

Finding the Fourth Proportional to 8,429.31, 12,640.67 and 3,161.45

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Solution

The fourth proportional to 8,429.31, 12,640.67 and 3,161.45 is: 4,740.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,429.31 : 12,640.67 = 3,161.45 : x
  2. Step 2: Convert to fraction form
    8,429.31/12,640.67 = 3,161.45/x
  3. Step 3: Cross multiply
    8,429.31x = 12,640.67 × 3,161.45
  4. Step 4: Simplify right side
    8,429.31x = 39,962,782.97
  5. Step 5: Solve for x
    x = 39,962,782.97/8,429.31
  6. Step 6: Final answer
    x = 4,740.93

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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.