Home / 20,998.68-31,512.60-12,250.68

Finding the Fourth Proportional to 20,998.68, 31,512.60 and 12,250.68

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Solution

The fourth proportional to 20,998.68, 31,512.60 and 12,250.68 is: 18,384.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.68 : 31,512.60 = 12,250.68 : x
  2. Step 2: Convert to fraction form
    20,998.68/31,512.60 = 12,250.68/x
  3. Step 3: Cross multiply
    20,998.68x = 31,512.60 × 12,250.68
  4. Step 4: Simplify right side
    20,998.68x = 386,050,778.57
  5. Step 5: Solve for x
    x = 386,050,778.57/20,998.68
  6. Step 6: Final answer
    x = 18,384.53

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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.