Home / 20,105.70-30,158.55-9,000.60

Finding the Fourth Proportional to 20,105.70, 30,158.55 and 9,000.60

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Solution

The fourth proportional to 20,105.70, 30,158.55 and 9,000.60 is: 13,500.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,105.70 : 30,158.55 = 9,000.60 : x
  2. Step 2: Convert to fraction form
    20,105.70/30,158.55 = 9,000.60/x
  3. Step 3: Cross multiply
    20,105.70x = 30,158.55 × 9,000.60
  4. Step 4: Simplify right side
    20,105.70x = 271,445,045.13
  5. Step 5: Solve for x
    x = 271,445,045.13/20,105.70
  6. Step 6: Final answer
    x = 13,500.90

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Similar ratio
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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.