Home / 20,315.06-30,481.68-12,917.60

Finding the Fourth Proportional to 20,315.06, 30,481.68 and 12,917.60

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Solution

The fourth proportional to 20,315.06, 30,481.68 and 12,917.60 is: 19,382.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,315.06 : 30,481.68 = 12,917.60 : x
  2. Step 2: Convert to fraction form
    20,315.06/30,481.68 = 12,917.60/x
  3. Step 3: Cross multiply
    20,315.06x = 30,481.68 × 12,917.60
  4. Step 4: Simplify right side
    20,315.06x = 393,750,149.57
  5. Step 5: Solve for x
    x = 393,750,149.57/20,315.06
  6. Step 6: Final answer
    x = 19,382.18

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1.5x scale

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.