Home / 20,813.85-31,216.41-9,725.76

Finding the Fourth Proportional to 20,813.85, 31,216.41 and 9,725.76

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Solution

The fourth proportional to 20,813.85, 31,216.41 and 9,725.76 is: 14,586.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,813.85 : 31,216.41 = 9,725.76 : x
  2. Step 2: Convert to fraction form
    20,813.85/31,216.41 = 9,725.76/x
  3. Step 3: Cross multiply
    20,813.85x = 31,216.41 × 9,725.76
  4. Step 4: Simplify right side
    20,813.85x = 303,603,311.72
  5. Step 5: Solve for x
    x = 303,603,311.72/20,813.85
  6. Step 6: Final answer
    x = 14,586.60

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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.