Home / 20,811.75-31,217.63-6,219.75

Finding the Fourth Proportional to 20,811.75, 31,217.63 and 6,219.75

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Solution

The fourth proportional to 20,811.75, 31,217.63 and 6,219.75 is: 9,329.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.75 : 31,217.63 = 6,219.75 : x
  2. Step 2: Convert to fraction form
    20,811.75/31,217.63 = 6,219.75/x
  3. Step 3: Cross multiply
    20,811.75x = 31,217.63 × 6,219.75
  4. Step 4: Simplify right side
    20,811.75x = 194,165,854.19
  5. Step 5: Solve for x
    x = 194,165,854.19/20,811.75
  6. Step 6: Final answer
    x = 9,329.63

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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.