Home / 19,380.20-29,021.70-12,770.60

Finding the Fourth Proportional to 19,380.20, 29,021.70 and 12,770.60

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Solution

The fourth proportional to 19,380.20, 29,021.70 and 12,770.60 is: 19,123.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,380.20 : 29,021.70 = 12,770.60 : x
  2. Step 2: Convert to fraction form
    19,380.20/29,021.70 = 12,770.60/x
  3. Step 3: Cross multiply
    19,380.20x = 29,021.70 × 12,770.60
  4. Step 4: Simplify right side
    19,380.20x = 370,624,522.02
  5. Step 5: Solve for x
    x = 370,624,522.02/19,380.20
  6. Step 6: Final answer
    x = 19,123.87

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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.