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Finding the Fourth Proportional to 20,001.80, 30,000.06 and 5,211.72

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Solution

The fourth proportional to 20,001.80, 30,000.06 and 5,211.72 is: 7,816.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,001.80 : 30,000.06 = 5,211.72 : x
  2. Step 2: Convert to fraction form
    20,001.80/30,000.06 = 5,211.72/x
  3. Step 3: Cross multiply
    20,001.80x = 30,000.06 × 5,211.72
  4. Step 4: Simplify right side
    20,001.80x = 156,351,912.70
  5. Step 5: Solve for x
    x = 156,351,912.70/20,001.80
  6. Step 6: Final answer
    x = 7,816.89

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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.