Home / 20,180.10-30,266.55-12,771.30

Finding the Fourth Proportional to 20,180.10, 30,266.55 and 12,771.30

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Solution

The fourth proportional to 20,180.10, 30,266.55 and 12,771.30 is: 19,154.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,180.10 : 30,266.55 = 12,771.30 : x
  2. Step 2: Convert to fraction form
    20,180.10/30,266.55 = 12,771.30/x
  3. Step 3: Cross multiply
    20,180.10x = 30,266.55 × 12,771.30
  4. Step 4: Simplify right side
    20,180.10x = 386,543,190.02
  5. Step 5: Solve for x
    x = 386,543,190.02/20,180.10
  6. Step 6: Final answer
    x = 19,154.67

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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.