Home / 20,789.17-28,685.74-11,836.84

Finding the Fourth Proportional to 20,789.17, 28,685.74 and 11,836.84

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Solution

The fourth proportional to 20,789.17, 28,685.74 and 11,836.84 is: 16,332.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,789.17 : 28,685.74 = 11,836.84 : x
  2. Step 2: Convert to fraction form
    20,789.17/28,685.74 = 11,836.84/x
  3. Step 3: Cross multiply
    20,789.17x = 28,685.74 × 11,836.84
  4. Step 4: Simplify right side
    20,789.17x = 339,548,514.66
  5. Step 5: Solve for x
    x = 339,548,514.66/20,789.17
  6. Step 6: Final answer
    x = 16,332.95

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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.