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Finding the Fourth Proportional to 20,011.20, 30,008.70 and 6,856.80

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Solution

The fourth proportional to 20,011.20, 30,008.70 and 6,856.80 is: 10,282.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.20 : 30,008.70 = 6,856.80 : x
  2. Step 2: Convert to fraction form
    20,011.20/30,008.70 = 6,856.80/x
  3. Step 3: Cross multiply
    20,011.20x = 30,008.70 × 6,856.80
  4. Step 4: Simplify right side
    20,011.20x = 205,763,654.16
  5. Step 5: Solve for x
    x = 205,763,654.16/20,011.20
  6. Step 6: Final answer
    x = 10,282.42

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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.