Home / 20,711.56-31,067.70-6,860.92

Finding the Fourth Proportional to 20,711.56, 31,067.70 and 6,860.92

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Solution

The fourth proportional to 20,711.56, 31,067.70 and 6,860.92 is: 10,291.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.56 : 31,067.70 = 6,860.92 : x
  2. Step 2: Convert to fraction form
    20,711.56/31,067.70 = 6,860.92/x
  3. Step 3: Cross multiply
    20,711.56x = 31,067.70 × 6,860.92
  4. Step 4: Simplify right side
    20,711.56x = 213,153,004.28
  5. Step 5: Solve for x
    x = 213,153,004.28/20,711.56
  6. Step 6: Final answer
    x = 10,291.50

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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.