Home / 20,859.68-31,286.28-6,819.60

Finding the Fourth Proportional to 20,859.68, 31,286.28 and 6,819.60

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Solution

The fourth proportional to 20,859.68, 31,286.28 and 6,819.60 is: 10,228.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.68 : 31,286.28 = 6,819.60 : x
  2. Step 2: Convert to fraction form
    20,859.68/31,286.28 = 6,819.60/x
  3. Step 3: Cross multiply
    20,859.68x = 31,286.28 × 6,819.60
  4. Step 4: Simplify right side
    20,859.68x = 213,359,915.09
  5. Step 5: Solve for x
    x = 213,359,915.09/20,859.68
  6. Step 6: Final answer
    x = 10,228.34

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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.