Home / 13,942.12-20,915.90-4,081.56

Finding the Fourth Proportional to 13,942.12, 20,915.90 and 4,081.56

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Solution

The fourth proportional to 13,942.12, 20,915.90 and 4,081.56 is: 6,123.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,942.12 : 20,915.90 = 4,081.56 : x
  2. Step 2: Convert to fraction form
    13,942.12/20,915.90 = 4,081.56/x
  3. Step 3: Cross multiply
    13,942.12x = 20,915.90 × 4,081.56
  4. Step 4: Simplify right side
    13,942.12x = 85,369,500.80
  5. Step 5: Solve for x
    x = 85,369,500.80/13,942.12
  6. Step 6: Final answer
    x = 6,123.14

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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.