Home / 20,867.50-31,301.22-5,286.34

Finding the Fourth Proportional to 20,867.50, 31,301.22 and 5,286.34

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Solution

The fourth proportional to 20,867.50, 31,301.22 and 5,286.34 is: 7,929.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.50 : 31,301.22 = 5,286.34 : x
  2. Step 2: Convert to fraction form
    20,867.50/31,301.22 = 5,286.34/x
  3. Step 3: Cross multiply
    20,867.50x = 31,301.22 × 5,286.34
  4. Step 4: Simplify right side
    20,867.50x = 165,468,891.33
  5. Step 5: Solve for x
    x = 165,468,891.33/20,867.50
  6. Step 6: Final answer
    x = 7,929.50

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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.