Home / 20,759.56-31,120.21-8,276.61

Finding the Fourth Proportional to 20,759.56, 31,120.21 and 8,276.61

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Solution

The fourth proportional to 20,759.56, 31,120.21 and 8,276.61 is: 12,407.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.56 : 31,120.21 = 8,276.61 : x
  2. Step 2: Convert to fraction form
    20,759.56/31,120.21 = 8,276.61/x
  3. Step 3: Cross multiply
    20,759.56x = 31,120.21 × 8,276.61
  4. Step 4: Simplify right side
    20,759.56x = 257,569,841.29
  5. Step 5: Solve for x
    x = 257,569,841.29/20,759.56
  6. Step 6: Final answer
    x = 12,407.29

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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.