Home / 20,939.05-28,891.77-12,443.77

Finding the Fourth Proportional to 20,939.05, 28,891.77 and 12,443.77

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Solution

The fourth proportional to 20,939.05, 28,891.77 and 12,443.77 is: 17,169.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.05 : 28,891.77 = 12,443.77 : x
  2. Step 2: Convert to fraction form
    20,939.05/28,891.77 = 12,443.77/x
  3. Step 3: Cross multiply
    20,939.05x = 28,891.77 × 12,443.77
  4. Step 4: Simplify right side
    20,939.05x = 359,522,540.77
  5. Step 5: Solve for x
    x = 359,522,540.77/20,939.05
  6. Step 6: Final answer
    x = 17,169.95

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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.