Home / 20,145.66-27,800.96-12,187.86

Finding the Fourth Proportional to 20,145.66, 27,800.96 and 12,187.86

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Solution

The fourth proportional to 20,145.66, 27,800.96 and 12,187.86 is: 16,819.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.66 : 27,800.96 = 12,187.86 : x
  2. Step 2: Convert to fraction form
    20,145.66/27,800.96 = 12,187.86/x
  3. Step 3: Cross multiply
    20,145.66x = 27,800.96 × 12,187.86
  4. Step 4: Simplify right side
    20,145.66x = 338,834,147.41
  5. Step 5: Solve for x
    x = 338,834,147.41/20,145.66
  6. Step 6: Final answer
    x = 16,819.22

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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.