Home / 20,711.60-31,067.40-19,107.80

Finding the Fourth Proportional to 20,711.60, 31,067.40 and 19,107.80

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Solution

The fourth proportional to 20,711.60, 31,067.40 and 19,107.80 is: 28,661.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.60 : 31,067.40 = 19,107.80 : x
  2. Step 2: Convert to fraction form
    20,711.60/31,067.40 = 19,107.80/x
  3. Step 3: Cross multiply
    20,711.60x = 31,067.40 × 19,107.80
  4. Step 4: Simplify right side
    20,711.60x = 593,629,665.72
  5. Step 5: Solve for x
    x = 593,629,665.72/20,711.60
  6. Step 6: Final answer
    x = 28,661.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.