Home / 20,778.71-31,144.91-8,295.53

Finding the Fourth Proportional to 20,778.71, 31,144.91 and 8,295.53

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Solution

The fourth proportional to 20,778.71, 31,144.91 and 8,295.53 is: 12,434.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.71 : 31,144.91 = 8,295.53 : x
  2. Step 2: Convert to fraction form
    20,778.71/31,144.91 = 8,295.53/x
  3. Step 3: Cross multiply
    20,778.71x = 31,144.91 × 8,295.53
  4. Step 4: Simplify right side
    20,778.71x = 258,363,338.05
  5. Step 5: Solve for x
    x = 258,363,338.05/20,778.71
  6. Step 6: Final answer
    x = 12,434.04

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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.