Home / 20,619.43-28,453.08-12,121.83

Finding the Fourth Proportional to 20,619.43, 28,453.08 and 12,121.83

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Solution

The fourth proportional to 20,619.43, 28,453.08 and 12,121.83 is: 16,727.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.43 : 28,453.08 = 12,121.83 : x
  2. Step 2: Convert to fraction form
    20,619.43/28,453.08 = 12,121.83/x
  3. Step 3: Cross multiply
    20,619.43x = 28,453.08 × 12,121.83
  4. Step 4: Simplify right side
    20,619.43x = 344,903,398.74
  5. Step 5: Solve for x
    x = 344,903,398.74/20,619.43
  6. Step 6: Final answer
    x = 16,727.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.