Home / 20,136.70-30,205.05-13,915.90

Finding the Fourth Proportional to 20,136.70, 30,205.05 and 13,915.90

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Solution

The fourth proportional to 20,136.70, 30,205.05 and 13,915.90 is: 20,873.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.70 : 30,205.05 = 13,915.90 : x
  2. Step 2: Convert to fraction form
    20,136.70/30,205.05 = 13,915.90/x
  3. Step 3: Cross multiply
    20,136.70x = 30,205.05 × 13,915.90
  4. Step 4: Simplify right side
    20,136.70x = 420,330,455.30
  5. Step 5: Solve for x
    x = 420,330,455.30/20,136.70
  6. Step 6: Final answer
    x = 20,873.85

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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.