Home / 20,997.75-31,496.63-8,685.75

Finding the Fourth Proportional to 20,997.75, 31,496.63 and 8,685.75

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Solution

The fourth proportional to 20,997.75, 31,496.63 and 8,685.75 is: 13,028.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,997.75 : 31,496.63 = 8,685.75 : x
  2. Step 2: Convert to fraction form
    20,997.75/31,496.63 = 8,685.75/x
  3. Step 3: Cross multiply
    20,997.75x = 31,496.63 × 8,685.75
  4. Step 4: Simplify right side
    20,997.75x = 273,571,810.59
  5. Step 5: Solve for x
    x = 273,571,810.59/20,997.75
  6. Step 6: Final answer
    x = 13,028.63

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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.