Home / 20,915.92-31,380.72-9,823.73

Finding the Fourth Proportional to 20,915.92, 31,380.72 and 9,823.73

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Solution

The fourth proportional to 20,915.92, 31,380.72 and 9,823.73 is: 14,738.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,915.92 : 31,380.72 = 9,823.73 : x
  2. Step 2: Convert to fraction form
    20,915.92/31,380.72 = 9,823.73/x
  3. Step 3: Cross multiply
    20,915.92x = 31,380.72 × 9,823.73
  4. Step 4: Simplify right side
    20,915.92x = 308,275,703.26
  5. Step 5: Solve for x
    x = 308,275,703.26/20,915.92
  6. Step 6: Final answer
    x = 14,738.81

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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.