Home / 20,934.12-28,891.10-11,979.84

Finding the Fourth Proportional to 20,934.12, 28,891.10 and 11,979.84

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Solution

The fourth proportional to 20,934.12, 28,891.10 and 11,979.84 is: 16,533.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,934.12 : 28,891.10 = 11,979.84 : x
  2. Step 2: Convert to fraction form
    20,934.12/28,891.10 = 11,979.84/x
  3. Step 3: Cross multiply
    20,934.12x = 28,891.10 × 11,979.84
  4. Step 4: Simplify right side
    20,934.12x = 346,110,755.42
  5. Step 5: Solve for x
    x = 346,110,755.42/20,934.12
  6. Step 6: Final answer
    x = 16,533.33

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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.