Home / 20,851.28-31,273.60-6,811.18

Finding the Fourth Proportional to 20,851.28, 31,273.60 and 6,811.18

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Solution

The fourth proportional to 20,851.28, 31,273.60 and 6,811.18 is: 10,215.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.28 : 31,273.60 = 6,811.18 : x
  2. Step 2: Convert to fraction form
    20,851.28/31,273.60 = 6,811.18/x
  3. Step 3: Cross multiply
    20,851.28x = 31,273.60 × 6,811.18
  4. Step 4: Simplify right side
    20,851.28x = 213,010,118.85
  5. Step 5: Solve for x
    x = 213,010,118.85/20,851.28
  6. Step 6: Final answer
    x = 10,215.69

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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.